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What is the Anatomical Position?

Mary McMahon
Updated Mar 03, 2024
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The anatomical position is a frame of reference that is used when people describe anatomy and movement. Because organisms often change position and orientation, using a standardized position when describing their features is important, as it allows people to clearly understand the anatomical location of features of interest, the relationship between various anatomical features, and the overall structure of an organism.

In an example of why this is important, when a human is standing upright, the top of the skull is considered “up,” and the soles of the feet are “down.” When the same human lies on his or her back, however, suddenly the positions of “up” and “down” change, with the front of the body facing up, and the back of the body facing down. The situation becomes even more complicated with organisms like fish, making it very difficult to describe anatomy in absolutes; if, for example, a structure is said to be “at the top” of an organism, the location of that structure might be unclear because the “top” varies depending on position.

Creating an absolute anatomical position eliminates this confusion. In humans, this position is a standing human facing forward, with the feet together and the arms relaxed at the sides, with the palms out and the thumbs facing away from the body. Many people may have noticed that anatomical illustrations and guidebooks usually show the body in this position for convenience, and to get people familiar with thinking of it as a frame of reference when thinking about the human body.

Once the anatomical position is defined, people can start to create additional definitions that can be used in discussions of anatomy, such as anatomical planes, arbitrary divisions of the body at various cross sections. Additionally, people can develop anatomical terms of location to refer to specific areas of a body. Terms like “dorsal” and “ventral,” for example, can be used to describe to describe the back and belly of an organism, with no confusion about where the those sides are.

Anatomical position can be used in a variety of settings. In keys that help people identify organisms ranging from fish to mushrooms, for example, questions or prompts that involve anatomical features are usually framed with this position in mind. Health care practitioners and bodyworkers also usually use anatomical terms of location when they discuss their patients and take notes that they or other practitioners may need to reference.

The Health Board is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a The Health Board researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Discussion Comments
By sunnySkys — On Aug 19, 2011

@strawCake - I agree. And I think the anatomical position at least makes logical sense. Most of us consider the head to be the "top" of the body as it is on the anatomical position.

The only thing that doesn't make sense is that the thumbs are facing away from the body. I don't know about you, but I don't naturally stand with my palms facing forwards. I guess at some point they had to decide on a hand position and go with it though.

By strawCake — On Aug 18, 2011

This is the first thing they teach you in an Anatomy and Physiology class! And no wonder. As the article pointed out, it's extremely important.

In the medical field, and in Anatomy and Physiology, it's important for everyone to have the same frame of reference. Especially during a medical procedure-it could be disastrous if the people involved can't understand directions given to them by their colleagues.

Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

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