Inflammation of the musculocutaneous nerve, which may cause pain or numbness in the forearm and elbow weakness.
Medical records and examination findings that document how much function you have lost in the affected arm are the most directly useful evidence. The key functions tied to the musculocutaneous nerve are flexion of the elbow and supination of the forearm, so strength testing, range-of-motion measurements, and nerve conduction or electromyography studies that show the degree of weakness or impairment in those movements help place the condition at a specific rating level.
Because the distinction between mild, moderate, severe, and complete paralysis turns on how much function is lost compared to the full paralysis picture, records showing progression or stability of symptoms over time are relevant. If your condition is wholly sensory — meaning you have no motor loss, only pain or altered sensation — the regulation limits the rating to mild or at most moderate, so documentation clearly distinguishing motor from sensory involvement matters. Statements from you or people who observe you daily describing how elbow and forearm weakness affects work tasks or ordinary activities can help show the real-world impact of your functional loss.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.
