A patient of supracondylar humerus fracture is unable to flex interphalangeal joint of the thumb. Which nerve is most likely injured?
(A) Median nerve (B) Superficial branch of ulnar nerve (C) AIN (D) Pin
(C) Flexion of interphalangeal joint of thumb is carried out by flexor pollicis longus. It is supplied by AIN, a branch of median nerve. Muscles which are supplied by AIN are flexor digitorum profundus (Lateral 1/2 ), flexor pollicis longus and pronator quadratus. PIN a branch of radial nerve causes finger drop Supra condylar fracture of Humerus - Order of nerve involvement in children:AIN > Median Nerve > Radial Nerve > Ulnar Nerve