FROMENT'S SIGN is due to which nerve injury?
High-Yield Explanation
FROMENT'S SIGN/BOOK TEST: - Tests Adductor pollicis muscle - It is innervated by ULNAR NERVE - In ulnar nerve injury, when the patient is asked to grasp a book firmly b/w thumb & other fingers of both the hands, Terminal phalanx of thumb on paralysed side becomes flexed at interphalangeal joint