Finger Flexion

In this video, the motion of finger flexion is occurring at the metacarpophalangeal (MCP) and interphalangeal (IP) joints. This motion is controlled by concentric muscle contraction. Concentric metacarpophalangeal (MCP) and interphalangeal (IP) joint flexion is demonstrated starting with the arm at the side of the body and the palm facing forward in the anatomical position for the upper extremity and ending in a fully flexed position as seen from a side or lateral view.