Pronator quadratus has the same innervation as the following muscl
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..
Flexor pollicis longus
Flexor digitorum superficialis
Palmaris longus
Flexor digitorum profundus of middle finger