User:CFCF/sandbox/Anatomical terms of motion
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This article is about anatomical terms of motion, for anatomical terms of the human body see Human anatomical terms, or for anatomical terms of location see Anatomical terms of location.
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The voluntary movement of body structures is accomplished by the contraction of muscles. Muscles may move parts of the skeleton relatively to each other, or may move parts of internal organs relatively to each other. All such movements are classified by the directions in which the affected structures are moved. In human anatomy, all descriptions of position and movement are based on the assumption that the body is in its complete medial and abduction stage and is in anatomical position.
The prefix hyper- is sometimes added to describe movement beyond the normal limits to a limb's or organ's motion, such as in hyperflexion or hyperextension. Such movements are variously important; they may be used in surgery, such as in temporarily dislocating joints for surgical procedures, and also may be important in that they may seriously stress the joints involved. Such prefixes are common in Medical terminology.