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Psychology of Human Behavior | The Great Courses

What comes to mind when you picture a psychologist? If you're like most people coming to this fascinating field for the first time, the answer may include a leather couch and a scholarly looking gentleman quietly taking notes and occasionally nodding. In some ways, such a picture would be accurate, a confirmation not only of the importance of Sigmund Freud in the history of psychology but also of the degree Freud dominates the popular perception of this discipline.

But the picture would be inaccurate, as well.

Freud was a physician, and the majority of psychologists are not. Both the psychoanalytic theory he pioneered and the therapeutic approach it was based onpsychoanalysishave seen their dominance wane in recent years. And psychologists today, as indebted as they may be to Freud's landmark explorations of our psychological landscape, are involved in far more than helping people cope with inner demons.

The expansive and varied roles of contemporary psychologists create another common imageof a crowd of white-coated researchers gathered around a maze, carefully recording a white rat's performance. It's another inadequate picture because experimental psychologists today usually work with people, not animals.

Moreover, the areas of interest those psychologists are pursuing now encompass every part of the process we use to develop and function as people:

A Basic Introduction to a Complex Subject

The Psychology of Human Behavior is an outstanding introduction to the field of psychology, beginning with its historical context and looking ahead to some of the directions it is likely to take in the future. Though the course is not intended to be an in-depth exploration of this constantly evolving discipline, its 36 lectures work smoothly as an easy-to-follow primer and offer the ideal starting point for satisfying curiosity about how the mind works, the perspectives from which that question can be approached, and directions for further learning.

Curiosity about the human mind is something Professor David W. Martin believes is present in just about everyoneeven if we don't always realize it.

"If you go to a party and see what people are talking about, they are talking about other people and other people's behavior."

"'Why did she leave him?' 'Why don't they bring up their kids in a better way?'"

"They are talking about human behavior, [something] we're all interested inand what we are going to be talking about in this course."

In keeping with the introductory nature of the lectures, Professor Martin maintains the discussion at a straightforward level, using technical terms when necessary and always defining them clearly. He presents this broad array of topics in a way that makes it apparent why his teaching skills have been so consistently honored.

He uses his own specialtyengineering psychologyas an example of the many new research areas that now fit comfortably beneath psychology's umbrella. As an engineering psychologist, Professor Martin studies how people function as components in a larger system of human-and-machinefor instance, why they see (or ignore) data presented on a computer screen... how they process information to make decisions in a specific environment formed by person and device... or even the best way to indicate which burners on a stove are controlled by which knobs.

This kind of career path has only lately become possible. As his lectures show, Professor Martin, like psychologists working in the field's many subspecialties, are the beneficiaries of decades of increased understanding of how the psyche and brain function, how information is processed, and how to go about gaining that understanding through sophisticated, state-of-the-art research methods.

A Time When "Introspection" Was Scientific Procedure

Odd as it seems today, the major method of data collection during experimental psychology's early days, around the turn of the 20th century, was through what was called introspection: Researchers were trained in concentrating on and identifying the methods their own minds used to process a stimulus presented to them, so they could then report the results!

Today neurologists and neuroscientists can see the electrical and chemical effects within the body's most complex organ as mental, physical, and emotional processes are stimulated.

Ultimately psychology is about human behavior: what we do and why we do it. And as Professor Martin moves across the landscape of psychology today, he introduces topics as varied as major types of mental disorders; the different kinds of physical, behavioral, and "talking" therapies available to treat them; and the ways simple learning is accomplished. He includes example after example of how complex that simple ideawhat we do and why we do itcan be.

Under such circumstances, notes Professor Martin, an insult that reduces one's statusthus one's ability to attract a matewould have been very consequential.

"Our genes are set up to have behavioral predispositions to considering these fighting words, and engaging in aggression, when somebody denigrates our status. That's apparently what's happening in these situations."

Similarly, evolution appears to have had a profound impact on the development of altruism, the ways we choose our sexual partners, why we make war, and even why we overeat. Though most of our understanding of human psychology has been gained in little more than a century, the puzzle psychologists are working to assemble and understand has been in process for a long, long time.

Psychology of Human Behavior can only begin to describe that puzzle, of course, but it is a fascinating descriptionboth a solid summary and an ideal starting point for those eager to find the keys to the puzzle's solution.

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Psychology of Human Behavior | The Great Courses

Human Behavior, Institutions, and Social Systems | Santa …

The appearance and persistence of such complex forms of human social organization as property rights, companies, markets, cities, nation states, and democratic forms of government raise fascinating questions about human social development.

Why and how were such systems advantageous to those who adopted them? How have these systems co-evolved? Why do cities live forever but companies eventually die? What are the underlying structures and dynamics of financial markets? Why did complex urban centers suddenly appear in at least six places around the world at about the same time?

Social systems have been a mainstay research direction at SFI. Today, a growing numbers of Institute researchers are taking an empirical, quantitative approach to theories in social systems. Massive data sets and scaling laws offer new ways to understand modern complex social systems. By adding the increasingly expansive and detailed archaeological records of early human social systems, researchers are gaining valuable insights into human social and cultural evolution.

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HUMAN BEHAVIOR Persuasive Tech – Stanford University

The Persuasive Tech Lab creates insight into how computing products can be designed to influence and change human behavior. Drawing on these insights, the labs director, BJ Fogg, has created a new model of human behavior change. The resources on this page address relate especially to that model and how they guide research and design.

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HUMAN BEHAVIOR Persuasive Tech - Stanford University

UC Davis Veterinary Genetics Laboratory

The Veterinary Genetics Laboratory (VGL) provides animal parentage verification, identification, forensics services, genetic diagnostics and genetic disease research as a self-supporting unit of the School of Veterinary Medicine at the University of California, Davis. VGL is internationally recognized as a pioneer and expert in DNA-based animal testing. VGL also offers an extensive animal forensic services program, diagnostic tests for genetic diseases, and support for genetic research in domestic species, primates and wildlife.

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UC Davis Veterinary Genetics Laboratory

Human Behavior

Human Behavior!

Human behavior psychology is a very complex topic, no matter how you try to discuss it or even attempt an explanation of how and why we function the way we do! According to a few well-known psychologists "Myers-Briggs" and "Keirsey" there are about sixteen distinct personality types, which defines our personality. And somewhere mixed into all of this information they can tell us if we are either a extroverted or introverted type of person.You know the "Mouse" and "Lion" type's.

If you want to learn more about your own personality, here would be a good place to start looking. http://www.keirsey.com/ Note! Be sure to make your way back here and finish the rest of the review. We'll leave the lights on.

Now! That you're back, you can see why we're not going into any great length, accept to say, its well beyond the scope of what we are doing here today.

Nevertheless, after all the things we do and don't know about human behavior and our different personalities and anxieties. Ranking very high on our list of anxieties, we find things like, the fear of death and taxes and many more things we humans fear. And very high on the list of fears we humans have is the fear of "Speaking in public."

Its important to note that no two people will react the same to any given event that may be on there list of things they fear. So you may also have many of the same fears they do and didn't realize it! But a good number of us do have one thing in common, that is when we suddenly find ourselves thrust into the lime light, so to speak, facing a group of people with the task of presenting a report or a presentation of some type, will or I should say we typically will go immediately into and experience various of stages of stage fright or even experience an anxiety attack at the mere mention of public speaking.

This condition can range anywhere from just having a very mild case of the jitters and being a little nervous about speaking or it can effect a person up to a point where the person is rendered completely unable to speak a word or they may even pass out cold!

Why? Because it is considered a normal behavioral trait that we humans all have. We usually exhibit these types of symptoms, plus a few more, when we are suddenly taken outside of our own comfort zone. Once we're forced outside of our comfort box, we immediately begin looking for ways to return to the relative safety and comfort of our own little world. First we begin by "Visualizing" the worst and then verbalizing to ourselves, saying things like " Why me, No way, I would rather die first, than speak before a group of people." Or am just going to embarrass myself, because I do not have a clue where to start or what to say, these are just a few of the many excuses we will use to retreat with if possible back to our own little space we call our comfort zone, where we are in control again of our non-treating environment.

All of us at times have experienced these very same feeling and have made similar excuses in the hopes it would keep us from doing something we didn't want to do or we felt uncomfortable about doing. What we are really saying to ourselves is that we lack self-confidence in ourselves.

A reality check is in order here! Many may consider yourself as an expert in your chosen field, but the simple truth of the matter is just because you now have decided to become an instructor, lecturer, speaker or teacher in some form in your chosen field, that alone in themselves does not shield you or me from experiencing or showing signs of even the most basic human emotions, such as nervousness, stage fright or anxiety. In some cases experiencing these emotions are enough to make even the most experienced amongst us want to run away and hide.

Those who are seeking to become a instructor/trainer should have a working knowledge of the Principles of Educational and Human Behavior Psychology. However, this is not a mandatory requirement you must do before you can teach others. Nevertheless, taking on the role as a professional trainer and being familiar with the terms and principles of teaching others is, anyone considering entering the training world should have a good working knowledge of the principles used. The better you understand how we humans function when it comes to learning and how we learn and what motivate us to learn, the more successful you will be as an instructor/trainer. However, for now only the areas that deals directly with the learning process will be briefly discussed here today.

First things first, what is a definition of learning? We all know we begin the learning process the day we are born, and it continues until the day we die. What happens to a person when they are learning? What process does he or she go through? (I have to say at this point, we are still learning how we learn things, it's still an on going learning process.)

We mainly learn new things because of our individual experiences, which may change our way of thinking, feeling, doing, or seeing the world around us. So basically, it would be safe to say learning is a change in behavior as the result of an experience. This change or learning, can be openly observed or it can be in the mind as a feeling, which is hard to see at times.

The characteristics of learning, learning concepts and generalizations, the laws of learning, factors that affect learning, and the transfer of learning are the many things that we need to understand as trainers. The more we do understand the learning process it only increases our chances of creating an effective learning environment and becoming a successful trainer.

Let's work our way through some of these learning processes by starting with:

Most people have a very definite ideals of what they want to do and achieve. A student brings his or her goals into the classroom. Some of these goals may be very personal and some they will share with you and their classmates. A student will learn best what will help them meet his or her goals. The learner's goal or purpose is of chief importance in the act of learning. A good instructor tries to relate learning material to the student's goal.

Learning comes through experience. Learning is a very individual process and must be done by the student themselves . . . the instructor cannot do this for them. Research has concluded that learning and knowledge is a part of a person. A person knowledge is gained from his or her experiences, and no two people react to the experience the same way. Each learns different things depending on how the situation affects their different needs. Previous experience conditions a person to respond to some things and to ignore others. Some experiences involve the individual as a whole, while others involve only their eyes, ears, and memory.

There are a number of factors in combination that affect the way in which an individual learns new information.

Major factors contributing to your learning style include:

Sensory Modalities:

The Senses:

Auditory-Listening:

Prefer verbal instructions to written ones. Is comfortable using spoken reinforcement mentally as well as aloud?

Visually-Seeing:

Reading-Visualizing Does well with reading comprehension? Prefers maps to verbal directions.

Kinesthetic-Moving:

Touching - hands-on Writing things down clarifies thoughts. Likes to draw pictures. Enjoys working with hands-likes lab classes.

Reasoning Type:

Deductive reasoning:

Studies premise first, then draw conclusions. Sees big picture first, then looks for details.

Inductive reasoning:

Likes to see examples first when learning new information before developing an overview. Prefers to learn game rules as it is played, not beforehand.

Learning Environment:

Interpersonal: working alone. Likes to solve problems by oneself. Does not like to work or study in groups?

Interpersonal: working with others. Prefers discussion with family and friends before decision is made. Likes to do assignments and study with others.

Do know how do you take in your information? To determine which methods you prefer, turn to "Appendix A" in the back of your training manual and take a few minutes to complete a learning inventory sheet.The information from the learning inventory is a brief inventory to assist you in determining your own style of learning. Use the information from this user friendly inventory to discover your own learning strengths which will help you maximize information gathering.

When everyone is finished let's all take a ten minute break!

Now your chance to take a break also. Back to the top or you may continue on, it's your choice!

Now, that you have an indication of your own style of learning, you can see that as an trainer you must provide to your students with experiences that are meaningful, varied and appropriate to the situation. It's not as easy as it sounds, but every effort on your part to provide an learning environment where the student can use their individual learning styles pay's off big both for your students and you. However, it requires you to work at it, you need to be creative, innovative, and challenging to your students.

For instance, by repetitious drill, a student can learn a long laundry list of principles, for example leadership. But the list is useless if one can't apply them correctly in real life situations. A person can do this if their learning experience has been both extensive and meaningful and they understand how to apply the principles. The learning experience which challenges the student requires involvement with feelings, thoughts, memory of past experiences, and physical activity is much better than just requiring the student to memorize a long list of things

Learning is a multifaceted process too. An instructor or teacher who thinks his or her job is only to train a student's body or memory is wasting their own and as well as the students time. Students may learn much more than the instructor planned or intended, because, as humans, they do not leave their thinking mind or feelings at home. As an example, a student studying Aircraft Maintenance may be learning to perform a check on a particular piece of equipment. However, in the process, they are learning new concepts and generalizations. The student may also be learning new uses for the principles of electronics. And may become more interested in black boxes and learn something about handling electronic equipment in general.

This experience results in changes in the students way of seeing, thinking, feeling, reacting and doing, even though the instructor's primary objective was to teach the student how to read a multi meter. Students in a classroom may also be learning cooperation, elements of good dynamics, and good and bad attitudes about life in general. The list is endless and is sometimes referred to as incidental, but it still has a great impact on the learning situation.

Learning is an active process. Never assume anything just because it is obvious to you. All too often, after an instructor has taught a lesson many times in the past, he or she will teach the subject strictly out of habit. Instead of watching their students, he or she becomes a robot, who walks into the classroom and begins talking. As if they had just push there on button, and the words begin to flow non-stop, but their minds are elsewhere.

How can this be avoided? Keep everyone active in the class, the students as well as the instructor. The more active a student is involved in the class, the greater their chances are for both learning and remembering. (If a student is to learn, they must react and respond. They are not a sponge that will soak up knowledge like water. The response may be outward or inward.) Since learning is a change in behavior as a result of experience, the interaction between students and instructor must be active. This action can be either answering the instructor questions, or working a practice exercise. The responsibility of creating active student participation lies with the instructor.

We have cover a lot up to now, for those who are reading this we have just scratched the surface a little. During the basic instructor course we cover the rest of this topic and the ones listed below.

Next we are heading to objectives go there now or back to the top! It's your choice!

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Human Behavior

Human behavior – Wikipedia, the free encyclopedia

Human behavior refers to the array of every physical action and observable emotion associated with individuals, as well as the human race as a whole. While specific traits of one's personality and temperament may be more consistent, other behaviors will change as one moves from birth through adulthood. In addition to being dictated by age and genetics, behavior, driven in part by thoughts and feelings, is an insight into individual psyche, revealing among other things attitudes and values. Social behavior, a subset of human behavior, study the considerable influence of social interaction and culture. Additional influences include ethics,encircling, authority, rapport, hypnosis, persuasion and coercion.

The behavior of humans (and other organisms or even mechanisms) falls within a range with some behavior being common, some unusual, some acceptable, and some outside acceptable limits. In sociology, behavior in general includes actions having no meaning, being not directed at other people, and thus all basic human actions. Behavior in this general sense should not be mistaken with social behavior, which is a more advanced social action, specifically directed at other people. The acceptability of behavior depends heavily upon social norms and is regulated by various means of social control. Human behavior is studied by the specialized academic disciplines of psychiatry, psychology, social work, sociology, economics, and anthropology.

Human behavior is experienced throughout an individuals entire lifetime. It includes the way they act based on different factors such as genetics, social norms, core faith, and attitude. Behavior is impacted by certain traits each individual has. The traits vary from person to person and can produce different actions or behavior from each person. Social norms also impact behavior. Due to the inherently conformist nature of human society in general, humans are pressured into following certain rules and displaying certain behaviors in society, which conditions the way people behave. Different behaviors are deemed to be either acceptable or unacceptable in different societies and cultures. Core faith can be perceived through the religion and philosophy of that individual. It shapes the way a person thinks and this in turn results in different human behaviors. Attitude can be defined as "the degree to which the person has a favorable or unfavorable evaluation of the behavior in question." [1] One's attitude is essentially a reflection of the behavior he or she will portray in specific situations. Thus, human behavior is greatly influenced by the attitudes we use on a daily basis.

Long before Charles Darwin published his book On the Origin of Species in 1859, animal breeders knew that patterns of behavior are somehow influenced by inheritance from parents. Studies of identical twins as compared to less closely related human beings, and of children brought up in adoptive homes, have helped scientists understand the influence of genetics on human behavior. The study of human behaviour genetics is still developing steadily with new methods such as genome-wide association studies.[2]

Social norms, the often-unspoken rules of a group, shape not just our behaviours but also our attitudes. An individuals behavior varies depending on the group(s) they are a part of, a characteristic of society that allows to norms heavily impact society. Without social norms, human society would not function as it currently does; humans would have to be more abstract in their behaviour, as there would not be a pre-tested 'normal' standardised lifestyle, and individuals would have to make many more choices for themselves. The institutionalisation of norms is, however, inherent in human society perhaps as a direct result of the desire to be accepted by others, which leads humans to manipulate their own behaviour in order to 'fit in' with others. Depending on their nature and upon one's perspective, norms can impact different sections of society both positively (e.g. eating, dressing warm in the winter) and negatively (e.g. racism, drug use).

Creativity is assumed to be present within every individual.[3] Without creative minds, we would not live in a modern world like today. Creativity pushes people past their comfort zone. For example, the Wright Brother's invention of the first practical fixed-wing aircraft. The aircraft first took flight in 1903, and fifty years later the first passenger jet airliner was introduced. Creativity is what defines human beings. Creativity has kept people alive during harsh conditions, and it has also made certain individuals wealthy. We use creativity in our daily lives as well, such as finding a shortcut to a destination.

Another important aspect of human behavior is their core faith. This faith can be manifested in the forms of religion, philosophy, culture, and/or personal belief and often affects the way a person can behave. 80% of the United States public claims some sort of belief in a higher power, which makes religion a large importance in society.[4] It is only natural for something that plays such a large role in society to have an effect on human behavior.[5]Morals are another factor of core faith that affects the way a person behaves. Emotions connected to morals including shame, pride, and discomfort and these can change the way a person acts. Most importantly, shame and guilt have a large impact on behavior.[6] Lastly, culture highly affects human behavior. The beliefs of certain cultures are taught to children from such a young age that they are greatly affected as they grow up. These beliefs are taken into consideration throughout daily life, which leads to people from different cultures acting differently. These differences are able to alter the way different cultures and areas of the world interact and act.[7]

An attitude is an expression of favor or disfavor toward a person, place, thing, or event.[8] The interesting thing about an attitude and human beings is that it alters between each individual. Everyone has a different attitude towards different things. A main factor that determines attitude is likes and dislikes. The more one likes something or someone the more one is willing to open up and accept what they have to offer. When one doesnt like something, one is more likely to get defensive and shut down. An example of how one's attitude affects one's human behavior could be as simple as taking a child to the park or to the doctor. Children know they have fun at the park so their attitude becomes willing and positive, but when a doctor is mentioned, they shut down and become upset with the thought of pain. Attitudes can sculpt personalities and the way people view who we are. People with similar attitudes tend to stick together as interests and hobbies are common. This does not mean that people with different attitudes do not interact, the fact is they do. What it means is that specific attitudes can bring people together (e.g., religious groups). Attitudes have a lot to do with the mind which highly relates to human behavior. The way a human behaves depends a lot on how they look at the situation and what they expect to gain from it.[9] Positive attitudes are better than negative ones as negativity can bring on negative emotions that most of the time can be avoided. It is up to humans to make sure their attitudes positively reflect the behaviors they want to show. This can be done by assessing their attitudes and properly presenting them in society.

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Human behavior - Wikipedia, the free encyclopedia

Articles about Human Behavior – latimes

ENTERTAINMENT

August 22, 2013 | By Sheri Linden

Shaking off cutesy for dour, Audrey Tautou plays the title role in "Thrse," a woman fumbling to free herself from an unfulfilled marriage. It's a welcome but not entirely successful change of pace for the French star, who's best known for frothier fare. The final film of Claude Miller, who died last year, is a handsome and quietly affecting - if at times frustrating - adaptation of Nobel laureate Franois Mauriac's 1927 novel "Thrse Desqueyroux. " (A 1962 version starred Emmanuelle Riva.)

ENTERTAINMENT

April 18, 2013 | By Betsy Sharkey, Los Angeles Times Film Critic

French director Franois Ozon can usually be counted on for dark irony of the juiciest sort - his 2003 "Swimming Pool" of sexual provocations comes to mind. But the filmmaker has an especially deft touch when a dash of comedy is mixed in. He uses this to delicious effect in his latest, "In the House. " Adapted by Ozon from Spanish playwright Juan Mayorga's "The Boy in the Last Row," the literary conceit upon which this "House" stands required some maneuvering to open up the world of Claude Garcia (Ernst Umhauer)

ENTERTAINMENT

September 13, 2012 | By Kenneth Turan, Los Angeles Times Film Critic

"The Master" takes some getting used to. This is a superbly crafted film that's at times intentionally opaque, as if its creator didn't want us to see all the way into its heart of darkness. It's a film bristling with vivid moments and unbeatable acting, but its interest is not in tidy narrative satisfactions but rather the excesses and extremes of human behavior, the interplay of troubled souls desperate to find their footing. PHOTOS: Celebrity photos by the Times Its writer-director, of course, is the all-out visionary Paul Thomas Anderson, an all-in filmmaker whose previous work like "Boogie Nights" and "There Will Be Blood" explored strong and compelling personal conflicts.

CALIFORNIA | LOCAL

August 23, 2012 | From Los Angeles Times staff reports

R. Duncan Luce, a UC Irvine mathematical psychologist who received the National Medal of Science in 2005 for his pioneering scholarship in behavioral sciences, died Aug. 11 at his home in Irvine after a brief illness, the university announced. He was 87. In 1988, Luce founded and became director of UC Irvine's Institute for Mathematical Behavioral Sciences. He was later named distinguished research professor in cognitive sciences and economics. His work, according to the university, combined formal math models with psychological experiments to try to understand and predict human behavior, including how individuals and groups make decisions.

ENTERTAINMENT

May 27, 2012 | By Dennis Lim, Special to the Los Angeles Times

Independence is a crucial part of the legend of John Cassavetes, the original Method actor turned DIY filmmaker. For that reason his early forays into studio directing - he made 1961's "Too Late Blues" for Paramount and 1963's Stanley Kramer-produced "A Child Is Waiting" for United Artists - are usually thought of as footnotes at best, or compromised failures at worst (a view that has been ascribed to Cassavetes himself). But even in these minor works, the Cassavetes touch - the delicate way of handling emotional messiness, the tough but ultimately generous view of human behavior - is unmistakable.

ENTERTAINMENT

December 25, 2011 | By Martin Rubin, Special to the Los Angeles Times

Tolstoy A Russian Life Rosamund Bartlett Houghton Mifflin Harcourt: 544 pp., $35 Count Lev Tolstoy is one of those writers who was as fascinating and complex as his novels and stories. A man so awful and quarrelsome to those around him, especially his long-suffering wife, was nonetheless able to produce masterpieces of serene introspection and humane insights. How could Tolstoy, a loner, a quintessential outsider all his life, understand and evoke the glittering social whirl and intricacies of fashionable salons?

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Articles about Human Behavior - latimes

Home > Cell Biology | Yale School of Medicine

When you express interest in a specific study, the information from your profile will be sent to the doctor conducting that study. If you're eligible to participate, you may be contacted by a nurse or study coordinator.

If you select a health category rather than a specific study, doctors who have active studies in that area may contact you to ask if you would like to participate.

In both cases, you will be contacted by the preferred method (email or phone) that you specified in your profile.

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anatomy | biology | Britannica.com

Anatomy,a field in the biological sciences concerned with the identification and description of the body structures of living things. Gross anatomy involves the study of major body structures by dissection and observation and in its narrowest sense is concerned only with the human body. Gross anatomy customarily refers to the study of those body structures large enough to be examined without the help of magnifying devices, while microscopic anatomy is concerned with the study of structural units small enough to be seen only with a light microscope. Dissection is basic to all anatomical research. The earliest record of its use was made by the Greeks, and Theophrastus called dissection anatomy, from ana temnein, meaning to cut up.

Comparative anatomy, the other major subdivision of the field, compares similar body structures in different species of animals in order to understand the adaptive changes they have undergone in the course of evolution.

face: superficial arteries and veins in humansEncyclopdia Britannica, Inc.This ancient discipline reached its culmination between 1500 and 1850, by which time its subject matter was firmly established. None of the worlds oldest civilizations dissected a human body, which most people regarded with superstitious awe and associated with the spirit of the departed soul. Beliefs in life after death and a disquieting uncertainty concerning the possibility of bodily resurrection further inhibited systematic study. Nevertheless, knowledge of the body was acquired by treating wounds, aiding in childbirth, and setting broken limbs. The field remained speculative rather than descriptive, though, until the achievements of the Alexandrian medical school and its foremost figure, the Greek Herophilus (flourished 300 bce), who dissected human cadavers and thus gave anatomy a considerable factual basis for the first time. Herophilus made many important discoveries and was followed by his younger contemporary Erasistratus, who is sometimes regarded as the founder of physiology. In the 2nd century ce the Greek physician Galen assembled and arranged all the discoveries of the Greek anatomists, including with them his own concepts of physiology and his discoveries in experimental medicine. The many books Galen wrote became the unquestioned authority for anatomy and medicine in Europe because they were the only ancient Greek anatomical texts that survived the Dark Ages in the form of Arabic (and then Latin) translations.

Owing to church prohibitions against dissection, European medicine in the Middle Ages relied upon Galens mixture of fact and fancy rather than on direct observation for its anatomical knowledge, though some dissections were authorized for teaching purposes. In the early 16th century, the artist Leonardo da Vinci undertook his own dissections, and his beautiful and accurate anatomical drawings cleared the way for the Flemish physician Andreas Vesalius to restore the science of anatomy with his monumental De humani corporis fabrica libri septem (1543; The Seven Books on the Structure of the Human Body), which was the first comprehensive and illustrated textbook of anatomy. As a professor at the University of Padua, Vesalius encouraged younger scientists to accept traditional anatomy only after verifying it themselves, and this more critical and questioning attitude broke Galens authority and placed anatomy on a firm foundation of observed fact and demonstration.

From Vesaliuss exact descriptions of the skeleton, muscles, blood vessels, nervous system, and digestive tract, his successors in Padua progressed to studies of the digestive glands and the urinary and reproductive systems. Hieronymus Fabricius, Gabriello Fallopius, and Bartolomeo Eustachio were among the most important Italian anatomists, and their detailed studies led to fundamental progress in the related field of physiology. William Harveys discovery of the circulation of the blood, for instance, was based partly on Fabriciuss detailed descriptions of the venous valves.

The new application of magnifying glasses and compound microscopes to biological studies in the second half of the 17th century was the most important factor in the subsequent development of anatomical research. Primitive early microscopes enabled Marcello Malpighi to discover the system of tiny capillaries connecting the arterial and venous networks, Robert Hooke to first observe the small compartments in plants that he called cells, and Antonie van Leeuwenhoek to observe muscle fibres and spermatozoa. Thenceforth attention gradually shifted from the identification and understanding of bodily structures visible to the naked eye to those of microscopic size.

The use of the microscope in discovering minute, previously unknown features was pursued on a more systematic basis in the 18th century, but progress tended to be slow until technical improvements in the compound microscope itself, beginning in the 1830s with the gradual development of achromatic lenses, greatly increased that instruments resolving power. These technical advances enabled Matthias Jakob Schleiden and Theodor Schwann to recognize in 183839 that the cell is the fundamental unit of organization in all living things. The need for thinner, more transparent tissue specimens for study under the light microscope stimulated the development of improved methods of dissection, notably machines called microtomes that can slice specimens into extremely thin sections. In order to better distinguish the detail in these sections, synthetic dyes were used to stain tissues with different colours. Thin sections and staining had become standard tools for microscopic anatomists by the late 19th century. The field of cytology, which is the study of cells, and that of histology, which is the study of tissue organization from the cellular level up, both arose in the 19th century with the data and techniques of microscopic anatomy as their basis.

In the 20th century anatomists tended to scrutinize tinier and tinier units of structure as new technologies enabled them to discern details far beyond the limits of resolution of light microscopes. These advances were made possible by the electron microscope, which stimulated an enormous amount of research on subcellular structures beginning in the 1950s and became the prime tool of anatomical research. About the same time, the use of X-ray diffraction for studying the structures of many types of molecules present in living things gave rise to the new subspecialty of molecular anatomy.

Scientific names for the parts and structures of the human body are usually in Latin; for example, the name musculus biceps brachii denotes the biceps muscle of the upper arm. Some such names were bequeathed to Europe by ancient Greek and Roman writers, and many more were coined by European anatomists from the 16th century on. Expanding medical knowledge meant the discovery of many bodily structures and tissues, but there was no uniformity of nomenclature, and thousands of new names were added as medical writers followed their own fancies, usually expressing them in a Latin form.

By the end of the 19th century the confusion caused by the enormous number of names had become intolerable. Medical dictionaries sometimes listed as many as 20 synonyms for one name, and more than 50,000 names were in use throughout Europe. In 1887 the German Anatomical Society undertook the task of standardizing the nomenclature, and, with the help of other national anatomical societies, a complete list of anatomical terms and names was approved in 1895 that reduced the 50,000 names to 5,528. This list, the Basle Nomina Anatomica, had to be subsequently expanded, and in 1955 the Sixth International Anatomical Congress at Paris approved a major revision of it known as the Paris Nomina Anatomica.

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Mechanics of Breathing – Breathing in Joy

Mechanics of Breathing

This explanation of the physiology of breathing shows how our health improves through the conscious connected breathing that we do in Transformation Breathwork.

Humans need a continuous supply of oxygen for cellular respiration, and they must get rid of excess carbon dioxide, the poisonous waste product of this process. Gas exchange supports this cellular respiration by constantly supplying oxygen and removing carbon dioxide. The oxygen we need is derived from the Earth's atmosphere, which is 21% oxygen. This oxygen in the air is exchanged in the body by the respiratory surface. In humans, the alveoli in the lungs serve as the surface for gas exchange.

Gas exchange in humans can be divided into five steps:

Other factors involved with respiration are:

Structure of the Human Respiratory System

The Nose - Usually air will enter the respiratory system through the nostrils. The nostrils then lead to open spaces in the nose called the nasal passages. The nasal passages serve as a moistener, a filter, and to warm upthe air before it reaches the lungs. The hairs existing within the nostrils prevents various foreign particles from entering.Different air passageways and the nasal passages are covered with a mucous membrane. Many of the cells which produce the cells that make up the membrane contain cilia. Others secrete a type a sticky fluid called mucus. The mucus and cilia collect dust, bacteria, and other particles in the air. The mucus also helps in moistening the air. Under the mucous membrane there are a large number of capillaries. The blood within these capillaries helps to warm the air as it passes through the nose. The nose serves three purposes. It warms, filters, and moistens the air before it reaches the lungs. You will obviously lose these special advantages if you breath through your mouth.

Pharynx and Larynx - Air travels from the nasal passages to the pharynx, or more commonly known as the throat. When the air leaves the pharynx it passes into the larynx, or the voice box. The voice box is constructed mainly of cartilage, which is a flexible connective tissue. The vocal chords are two pairs of membranes that are stretched across the inside of the larynx. As the air is expired, the vocal chords vibrate. Humans can control the vibrations of the vocal chords, which enables us to make sounds. Food and liquids are blocked from entering the opening of the larynx by the epiglottis to prevent people from choking during swallowing.

Trachea - The larynx goes directly into the trachea or the windpipe. The trachea is a tube approximately 12 centimeters in length and 2.5 centimeters wide. The trachea is kept open by rings of cartilage within its walls. Similar to the nasal passages, the trachea is covered with a ciliated mucous membrane. Usually the cilia move mucus and trapped foreign matter to the pharynx. After that, they leave the air passages and are normally swallowed. The respiratory system cannot deal with tobacco smoke very keenly. Smoking stops the cilia from moving. Just one cigarette slows their motion for about 20 minutes. Thetobacco smokeincreases the amount of mucus in the air passages. When smokers cough, their body is attempting to dispose of the extra mucus.

Bronchi - Around the center of the chest, the trachea divides into two cartilage-ringed tubes called bronchi. Also, this section of the respiratory system is lined with ciliated cells. The bronchi enter the lungs and spread into a treelike fashion into smaller tubes calle bronchial tubes.

Bronchioles - The bronchial tubes divide and then subdivide. By doing this their walls become thinner and have less and less cartilage. Eventually, they become a tiny group of tubes called bronchioles.

Alveoli - Each bronchiole ends in a tiny air chamber that looks like a bunch of grapes. Each chamber contains many cup-shaped cavities known as alveoli. The walls of the alveoli, which are only about one cell thick, are the respiratory surface. They are thin, moist, and are surrounded by several numbers of capillaries. The exchange of oxygen and carbon dioxide between blood and air occurs through these walls. The estimation is that lungs contain about 300 million alveoli. Their total surface area would be about 70 square meters. That is 40 times the surface area of the skin. Smoking makes it difficult for oxygen to be taken through the alveoli. When the cigarette smoke is inhaled, about one-third of the particles will remain within the alveoli. There are too many particles from smoking or from other sources of air pollution which can damage the walls in the alveoli. This causes a certain tissue to form. This tissue reduces the working area of the respiratory surface and leads to the disease called emphysema.

Breathing

Breathing consists of two phases, inspiration and expiration. During inspiration, the diaphragm and the intercostal muscles contract. The diaphragm moves downwards increasing the volume of the thoracic (chest) cavity, and the intercostal muscles pull the ribs up expanding the rib cage and further increasing this volume. This increase of volume lowers the air pressure in the alveoli to below atmospheric pressure. Because air always flows from a region of high pressure to a region of lower pressure, it rushes in through the respiratory tract and into the alveoli. This is called negative pressure breathing, changing the pressure inside the lungs relative to the pressure of the outside atmosphere. In contrast to inspiration, during expiration the diaphragm and intercostal muscles relax. This returns the thoracic cavity to it's original volume, increasing the air pressure in the lungs, and forcing the air out.

External Respiration

When a breath is taken, air passes in through the nostrils, through the nasal passages, into the pharynx, through the larynx, down the trachea, into one of the main bronchi, then into smaller bronchial tubules, through even smaller bronchioles, and into a microscopic air sac called an alveolus. It is here that external respiration occurs. Simply put, it is the exchange of oxygen and carbon dioxide between the air and the blood in the lungs. Blood enters the lungs via the pulmonary arteries. It then proceeds through arterioles and into the alveolar capillaries. Oxygen and carbon dioxide are exchanged between blood and the air. This blood then flows out of the alveolar capillaries, through venuoles, and back to the heart via the pulmonary veins. For an explanation as to why gasses are exchanged here, see partial pressure.

Gas Transport

If 100mL of plasma is exposed to an atmosphere with a pO2 of 100mm Hg, only 0.3mL of oxygen would be absorbed. However, if 100mL of bloodis exposed to the same atmosphere, about 19mL of oxygen would be absorbed. This is due to the presence of haemoglobin, the main means of oxygen transport in the body. The respiratory pigment haemoglobin is made up of an iron-containing porphyron, haem, combined with the protein globin. Each iron atom in haem is attached to four pyrole groups by covalent bonds. A fifth covalent bond of the iron is attached to the globin part of the molecule and the sixth covalent bond is available for combination with oxygen. There are four iron atoms in each hemoglobin molecule and therefore four heam groups.

Oxygen Transport -

In the loading and unloading of oxygen, there is a cooperation between these four haem groups. When oxygen binds to one of the groups, the others change shape slightly and their attraction to oxygen increases. The loading of the first oxygen, results in the rapid loading of the next three (forming oxyhemoglobin). At the other end, when one group unloads it's oxygen, the other three rapidly unload as their groups change shape again having less attraction for oxygen. This method of cooperative binding and release can be seen in the dissociation curve for hemoglobin. Over the range of oxygen concentrations where the curve has a steep slope, the slightest change in concentration will cause hemoglobin to load or unload a substantial amount of oxygen. Notice that the steep part of the curve corresponds to the range of oxygen concentrations found in the tissues. When the cells in a particular location begin to work harder, e.g. during exercise, oxygen concentration dips in that location, as the oxygen is used in cellular respiration. Because of the cooperation between the haem groups, this slight change in concentration is enough to cause a large increase in the amount of oxygen unloaded.

As with all proteins, hemoglobin's shape shift is sensitive to a variety of environmental conditions. A drop in pH lowers the attraction of hemoglobin to oxygen, an effect known as the Bohr shift. Because carbon dioxide reacts with water to produce carbonic acid, an active tissue will lower the pH of it's surroundings and encourage hemoglobin to give up extra oxygen, to be used in cellular respiration. Hemoglobin is a notable molecule for it's ability to transport oxygen from regions of supply to regions of demand.

Carbon Dioxide Transport - Out of the carbon dioxide released from respiring cells, 7% dissolves into the plasma, 23% binds to the multiple amino groups of hemoglobin (Caroxyhemoglobin), and 70% is carried as bicarbonate ions. Carbon dioxide created by respiring cells diffuses into the blood plasma and then into the red blood cells, where most of it is converted to bicarbonate ions. It first reacts with water forming carbonic acid, which then breaks down into H+ and CO3-. Most of the hydrogen ions that are produced attach to hemoglobin or other proteins.

Internal Respiration

The body tissues need the oxygen and have to get rid of the carbon dioxide, so the blood carried throughout the body exchanges oxygen and carbon dioxide with the body's tissues. Internal respiration is basically the exchange of gasses between the blood in the capillaries and the body's cells.

The respiratory center is gray matter in the pons and the upper Medulla, which is responsible for rhythmic respiration. This center can be divided into an inspiratory center and an expiratory center in the Medulla, an apneustic center in the lower and midpons and a pneumotaxic center in the rostral-most part of the pons. This respiratory center is very sensitive to the pCO2 in the arteries and to the pH level of the blood.The CO2 can be brought back to the lungs in three different ways; dissolved in plasma, as carboxyhemoglobin, or as carbonic acid. That particular form of acid is almost broken down immediately by carbonic hydrase into bicarbonate and hydrogen ions. This process is then reversed in the lungs so that water and carbon dioxide are exhaled. The Medulla Oblongata reacts to both CO2 and pH levels which triggers the breathing process so that more oxygen can enter the body to replace the oxygen that has been utilized. The Medulla Oblongata sends neural impulses down through the spinal chord and into the diaphragm. The impulse contracts down to the floor of the chest cavity, and at the same time there is a message sent to the chest muscles to expand causing a partial vacuum to be formed in the lungs. The partial vacuum will draw air into the lungs.

There are two other ways the Medulla Oblongata can be stimulated. The first type is when there is an oxygen debt (lack of oxygen reaching the muscles), andthis produces lactic acid which lowers the pH level.The Medulla Oblongata is then stimulated. If the pH rises it begins a process known as the Bohr shift. The Bohr shift is affected when there are extremely high oxygen and carbon dioxide pressures present in the human body. This factor causes difficulty for the oxygen and carbon dioxide to attach to hemoglobin. When the body is exposed to higher altitudes the oxygen will not attach to the hemoglobin properly, causing the oxygen level to drop and the person will black out. This theory also applies to divers who go to great depths, and the pressure of the oxygen becomes poisonous. These pressures are known as pO2 and pCO2, or partial pressures. The second type occurswhen the major arteries in the body called theaortic and carotid bodies, sense a lack of oxygen within the blood and they send messages to the Medulla Oblongata.

Various marine mammals have been found to have adapted special abilities which help in their respiratory processes, enabling them to remain down at great depths for long periods of time. The Weddell seal possesses some amazing abilities. It only stores 5% of its oxygen in its lungs, and keeps the remaining 70% of its oxygen circulating throughout the blood stream. Humans are only able to keep a small 51% of their oxygen circulating throughout the blood stream, while 36% of the oxygen is stored in the lungs. The explanation for this is that the Weddell seal has approximately twice the volume of blood per kilogram as humans. As well, the Weddell seal's spleen has the ability to store up to 24L of blood. It is believed that when the seal dives the spleen contracts causing the stored oxygen enriched blood to enter the blood stream. Also, these seals have a higher concentration of a certain protein found within the muscles known as myoglobin, which stores oxygen. The Weddell seal contains 25% of its oxygen in the muscles, while humans only keep about 12% of their oxygen within the muscles.

Not only does the Weddell seal store oxygen for long dives, but they consume it wisely as well. A diving reflex slows the pulse, and an overall reduction in oxygen consumption occurs due to this reduced heart rate. Regulatory mechamisms reroute blood to where it is needed most (brain, spinal cord, eyes, adrenal glands, and in some cases placenta) by constricting blood flow where it is not needed (mainly in the digestive system). Blood flow is restricted to muscles during long dives and they rely on oxygen stored in their myoglobin and make their ATP from fermentation rather then from respiration.

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Mechanics of Breathing - Breathing in Joy