These bones kind the middle aspect, the again with the hand or palm spot. You'll find five metacarpal bones from the human body, with each of these extended bones possessing a foundation, shaft, and head. Boutonniere Deformity: The MCP (metacarpophalangeal) joints and also the DIP (distal interphalangeal) joints are afflicted.  The https://www.theorthopaedicandpainpractice.com/what-are-the-different-bones-found-in-my-hand/