Choose the appropriate lettered site or structure in the following radiograph of the wrist and hand. Destruction of the structure indicated by the letter E most likely causes weakness of which of the following muscles?: (A) Flexor carpi radialis, (B) Palmaris longus, (C) Flexor carpi ulnaris, (D) Brachioradialis
Answer is C. (c) The hook of hamate and the pisiform provide insertion for the flexor carpi ulnaris.