A 38-year-old woman with inflammatory arthritis presents wit…

A 38-yeаr-оld wоmаn with inflаmmatоry arthritis presents with progressive weakness of forearm pronation. She reports repetitive gripping with pronation during work. Which of the following nerves is compressed, and at what location? Related objective: LO6 (Anterior forearm deep layer—pronator quadratus muscle & anterior interosseous nerve innervation; functional significance of pronators)