Final answer:
The median nerve innervates the flexor pollicis longus in the forearm.
Step-by-step explanation:
The median nerve innervates the flexor pollicis longus.
The median nerve is a major nerve in the upper limb that originates from the brachial plexus and supplies multiple muscles in the arm and hand. It travels through the anterior compartment of the forearm, where the flexor pollicis longus is located, and provides motor innervation to this muscle.
Other muscles innervated by the median nerve in the forearm include the flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis brevis.