A 37-year-old patient presented to you with hyper-extension of 4th and 5th metacarpophalangeal joint with flexion at proximal interphalangeal joint. This deformity is due to injury to:
Deep branch of ulnar nerve
Median nerve
Radial nerve
Superficial branch of median nerve
Ans: A. Deep branch of ulnar nerve(Ref: Gray's 41/C p784, 866, 40/e p888)Deformity = Claw hand.Due to injury of deep branch of ulnar nerve.