In the human body, a system involving the contact of two rigid body-segments that transmit forces. Kinematic couples may connect successively or they may connect by branches to form chains of several kinetic links. If the final link of the chain is free, it is able to move independently of the other links and the chain is known as an open chain; if the final link is not free to move, the chain is known as a closed chain. A closed chain does not permit isolated movements, but it does facilitate the transmission of muscle actions to adjacent or distant articulations. See also kinetic link principle.
Subjects: Sports and Exercise Medicine.