A child with Supracondylar fracture is unable to flex his interphalangeal joint of thumb. Which nerve is most likely injured ?: (A) Median nerve, (B) Deep branch of ulnar nerve, (C) Posterior Interosseus nerve, (D) Anterior Interosseus nerve
Answer is D. Flexion at Interphalyngeal joint of thumb caused by FlexorPollicisLongus which us supplied by anterior Interosseus nerve a branch of median nerve . Anterior Interooseus nerve is the most commonly injured nerve in Supracondylar humerus fracture Refer : maheswari 9th ed