Which nerve innervates the pronator teres?

The pronator teres muscle is primarily innervated by the median nerve. This nerve plays a vital role in the forearm's pronation movement and the flexion of the elbow. The median nerve originates from the brachial plexus and travels down the arm, innervating several muscles in the forearm and hand, including the pronator teres.

The pronator teres facilitates pronation by allowing the radius to rotate over the ulna, which is essential for actions such as turning a doorknob or using a screwdriver. The specific motor function served by the median nerve in this context highlights the importance of this nerve in ensuring a wide range of activities involving hand and forearm movements. Understanding this innervation is crucial for recognizing potential issues arising from nerve injuries that may affect hand function.