The musculocutaneous nerve is one of five major nerves that originate in the brachial plexus, responsible for movement and sensation in the upper limb. Alternate terms for this nerve include the lateral cutaneous nerve of the forearm, cutaneus brachii nerve, and the nervus musculocutaneus. The musculocutaneous nerve begins in the cervical spine, runs down through the axilla and the upper arm, and supplies sensation to the anterior forearm and hand. Its primary motor function is flexion of the forearm at the elbow joint. Injuries to this nerve can cause significant functional impairment, making alternative therapies such as physical therapy a vital intervention for recovery.