Ulnar Claw Hand (Claw Hand): this is due to a lesion on the ulnar nerve. The MCP joints are hyperextended for the ring and very little fingers as a result of loss of the third and fourth lumbrical muscles as a consequence of a lesion from the deep branch of your https://www.theorthopaedicandpainpractice.com/what-are-the-different-bones-found-in-my-hand/