The musculocutaneous nerve becomes the lateral antebrachial cutaneous nerve when the brachialis nerve branch forks off to innervate the brachialis muscle.
• Provides sensation to the lateral cutaneous aspect of the forearm through the musculocutaneous nerve. • Injury to the musculocutaneous nerve from which LABC branches from will result in a sensory deficit of the LABC nerve territory. Course: 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. • Patient complaints of pain at the dorso-radial/lateral forearm/wrist area require examination of this nerve especially after previous surgery/injury to his area. • Provides sensation to the lateral cutaneous aspect of the forearm.• Originates from roots C5, C6, C7 and branches from the musculocutaneous nerve. Course: 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 1 The lateral femoral cutaneous nerve provides sensation to the anterior and lateral sides of the thigh. 2  Median nerve – This nerve is a branch of the medial and lateral cords of the brachial plexus. 3  The median nerve provides sensation to the thumb, 1st, 2nd, 3rd and half of the 4th finger. 1 Lateral femoral cutaneous nerve – This nerve is part of the lumbar plexus nerve network. 2  The lateral femoral cutaneous nerve provides sensation to the anterior and lateral sides of the thigh. 3 The medial antebrachial cutaneous nerve (internal cutaneous nerve, medial cutaneous nerve of forearm) arises from the medial cord of the brachial plexus. It derives its fibers from the eighth cervical and first thoracic nerves, and at its commencement is placed medial to the axillary artery.  • Patient complaints of pain at the dorso-radial/lateral forearm/wrist area require examination of this nerve especially after previous surgery/injury to his area. • Provides sensation to the lateral cutaneous aspect of the forearm.• Originates from roots C5, C6, C7 and branches from the musculocutaneous nerve. Course: 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. musculocutaneous nerve origin, lateral cord of brachial plexus—C5–C7; branches, lateral cutaneous nerve of forearm, and muscular branches; distribution, coracobrachial and biceps brachial muscles, the elbow joint, and skin of radial side of forearm; modality, general sensory and motor.  • Test the skin along the lateral aspect of the forearm/wrist for reduced/absent sensation by use of light touch or other sensory examination modalities. Clinical Relevance: • Provides sensation to the lateral cutaneous aspect of the forearm through the musculocutaneous nerve. • Injury to the musculocutaneous nerve from which LABC branches from will result in a sensory deficit of the LABC nerve territory. Course: 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. The lateral antebrachial cutaneous nerve (or lateral cutaneous nerve of forearm) (branch of musculocutaneous nerve, also sometimes spelled antebrachial) passes behind the cephalic vein, and divides, opposite the elbow-joint, into a volar and a dorsal branch. Contents. It supplies the skin of the lower two-thirds of the dorso-lateral surface of the forearm, communicating with the superficial branch of the radial nerve and the dorsal antebrachial cutaneous branch of the radial. It provides sensation to the anterior (front) of the thigh. The lateral femoral cutaneous nerve is part of the lumbar plexus nerve network. It provides sensation to the antero-lateral aspect of the thigh and has some overlap in sensation with the femoral nerve. As a pure sensory nerve, it does not operate any muscles. Meralgia paresthetica is caused by nerve entrapment. The lateral femoral cutaneous nerve running through your pelvis, groin and into the thighs becomes compressed. This can be caused by swelling, trauma, or pressure narrowing these openings and squeezing the nerve.
http://nervesurgery.wustl.edu/ev/sensation/ArmElbow/MusculocutaneousNerve/Pages/LateralAntebrachialCutaneousNerve.aspx http://nervesurgery.wustl.edu/ev/sensation/ArmElbow/MusculocutaneousNerve/Pages/LateralAntebrachialCutaneousNerve.aspx http://www.hopkinsmedicine.org/neurology_neurosurgery/centers_clinics/peripheral_nerve_surgery/conditions/peripheral_nerve_system.html https://en.wikipedia.org/wiki/Medial_cutaneous_nerve_of_forearm http://nervesurgery.wustl.edu/ap/armandelbow/musculocutaneous/Pages/LateralAntebrachialCutaneousNerve.aspx http://medical-dictionary.thefreedictionary.com/cutaneous+nerve+of+arm%2c+inferior+lateral http://nervesurgery.wustl.edu/ap/armandelbow/musculocutaneous/Pages/LateralAntebrachialCutaneousNerve.aspx https://en.wikipedia.org/wiki/Lateral_cutaneous_nerve_of_forearm http://www.hopkinsmedicine.org/neurology_neurosurgery/centers_clinics/peripheral_nerve_surgery/conditions/meralgia_paresthetica.html
where does the lateral cutaneous nerve of the arm come from