The Elbow Essay by The Research Group

The Elbow
Examines structure of arm joint, functions, movements, bones, stability, muscles and compression.
# 13427 | 1,125 words | 5 sources | 1999 | US
Published on Jul 10, 2003 in Biology (General)

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From the Paper:

"The elbow is a hinge joint that joins the upper arm with the forearm. It is the second link in a mechanical chain of levers that begins at the shoulder and ends at the fingertips The motion of the elbow allows the height and length of the upper extremity to be adjusted, and forearm motion allows the hand to be placed in the most effective position for function. This paper will look at the structure of the elbow and how it functions in various movements, such as the bench press.
The elbow is part of a kinematic chain of joints which runs from the thoracic wall to the fingertips (Smith, Weiss & Lehmkuhl, 1996, pp. 9-10). In this chain, 19 degrees of freedom in planar motions can be identified. This freedom of motion constitutes the mechanical basis for performances of skilled manual activities and the versatility of the upper extremity."

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