The extensor mechanism functions through two sets of muscles which extend three joints (MCP, PIP, DIP) and flex one joint (the metacarpophalangeal [MCP]) (Fig. 6). The two systems are ...
The knuckles are called the metacarpophalangeal (MCP) joints, proximal interphalangeal (PIP) joints, and distal ...
Medically reviewed by Anita C. Chandrasekaran, MD ​Ulnar deviation is a deformity of the hand that affects people with ...