Which nerve innervates the Flexor digitorum superficialis?

The Flexor digitorum superficialis is primarily innervated by the Median Nerve. This muscle plays a vital role in the flexion of the fingers at the proximal interphalangeal joints and assists in flexing the metacarpophalangeal joints. The Median Nerve, which originates from the brachial plexus, specifically provides motor innervation to the muscles of the anterior compartment of the forearm, including the Flexor digitorum superficialis. This nerve also supplies sensation to parts of the hand, which relates to its function in fine motor tasks and gripping.

In contrast, the Ulnar Nerve innervates other intrinsic muscles of the hand and the medial aspect of the forearm but does not supply the Flexor digitorum superficialis. The Radial Nerve primarily innervates the extensor muscles of the forearm, and the Musculocutaneous Nerve is mainly responsible for supplying the muscles in the anterior compartment of the arm, such as the biceps brachii. Thus, all three of these nerves do not play a role in innervating the Flexor digitorum superficialis, thereby confirming the Median Nerve's definitive contribution to this muscle.