<prompt> Pronator quadratus has the same innervation as the following musclFlexor pollicis longusFlexor digitorum superficialisPalmaris longusFlexor digitorum profundus of middle finger  <response>: Flexor pollicis longus The most appropriate answer to this question is flexor pollicis longus. Anterior interosseous nerve AIN is the deep branch of median nerve and takes care of three muscles...namely flexor pollicis longus, pronator quadratus and the radial half of flexor digitorum profundus for the index and middle finger in the anterior forearm. Flexor digitorum profundus is a hybrid muscle...being supplied by two nerves...ulnar nerve supplying its medial half ring and little finger. The middle finger can have overlap of nerve supply...and could be getting supply from ulnar nerve in paial or total entirely. Hence FPL is first option and FDP is second in preferential order.. 