A patient of supracondylar humerus fracture is unable to flex interphalangeal joint of the thumb. Which nerve is most likely injured?
High-Yield Explanation
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