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Unformatted text preview: 2. Which bone(s) is (are) free to move and which bone(s) is (are) fixed in position. This is usually determined by the stabilizing action of muscles. 3. Action of neutralizing muscles preventing an unwanted action of an agonist which is capable of more than one action 4. Direction of the line of gravity relative to the joint center. Gravity acting on body segments will cause joint turning. This turning force is greatest when the line of gravity is perpendicular to the mechanical axis of the bone. Gravity causes no turning, at all, when the line of gravity is directly in line with the mechanical axis of the bone....
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- Spring '10
- Causality, Fundamental physics concepts, Joint Center