The brain sends messages from the nerves telling the muscles from the forearm and hand how and when to maneuver. Wrist drop can also be observed in lesions of your posterior interosseous nerve, that is shaped from the deep branch of your radial nerve because it emerges from beneath the https://www.theorthopaedicandpainpractice.com/what-are-the-different-bones-found-in-my-hand/