where does the lateral cutaneous nerve of the arm come from
â¢ Provides sensation to the lateral cutaneous aspect of the forearm through the musculocutaneous nerve. â¢ Injury to the musculocutaneous nerve from which LABC branches from will result in a sensory deficit of the LABC nerve territory.ourse: The musculocutaneous nerve becomes the lateral antebrachial cutaneous nerve when the brachialis nerve branch forks off to innervate the brachialis muscle. The lateral antebrachial cutaneous nerve continues distally to innervate the lateral aspect of the forearm.