Ulnar Claw Hand (Claw Hand): this is because of a lesion of your ulnar nerve. The MCP joints are hyperextended with the ring and very little fingers because of the lack of the 3rd and fourth lumbrical muscles resulting from a lesion on the deep department on the ulnar nerve. These https://www.theorthopaedicandpainpractice.com/what-are-the-different-bones-found-in-my-hand/