A mother brings her 8-year-old son to the clinic. Three days…

A mother brings her 8-year-old son to the clinic. Three days earlier he and another child had been “sword fighting” with wooden swords. The boy received a sharp blow to his right lower extremity, and since then his foot has “dragged” when he walks. Physical examination shows that he can raise up on his toes, but cannot walk on his heels. Further testing shows that he cannot dorsiflex his right foot. Sensation is intact on the foot, except for numbness of the web space between the first and second digits. Which one of the following is the most likely site of his injury?

A woman falls from her bicycle, landing on her elbow. The im…

A woman falls from her bicycle, landing on her elbow. The impact with the ground damages her ulnar nerve as it passes through the cubital tunnel. If the ulnar nerve loses all function as a result of this injury, what is the likely effect on the metacarpophalangeal (MCP) joints of her hand?