Ulnar Claw Hand (Claw Hand): this is due to a lesion in the ulnar nerve. The MCP joints are hyperextended to the ring and minor fingers due to the loss of the third and fourth lumbrical muscles resulting from a lesion of your deep department in the ulnar nerve. Just about https://www.theorthopaedicandpainpractice.com/what-are-the-different-bones-found-in-my-hand/