Musculocutaneous Nerve

• Musculocutaneous Nerve - Sensory supply:

  • Skin on the lateral half of the forearm down to the base of the thumb (via the lateral cutaneous nerve of the forearm)

  A) musculocutaneous nerve

  
• Musculocutaneous Nerve - Motor supply:

  • Biceps brachii
  • medial part of brachialis and coracobrachialis

  A) musculocutaneous nerve

  
• Musculocutaneous Nerve:

  1. Arises from the ventral rami of C5, C6 and C7, the superior and middle trunks (anterior divisions) and the lateral cord
  2. In the axilla it lies lateral to the axillary artery
  3. It descends into the arm by piercing coracobrachialis (which it also innervates)
  4. It then runs distally between biceps and brachialis into the lateral side of the arm
  5. At the elbow it becomes the lateral cutaneous nerve of the forearm which emerges laterally from underneath biceps

  A) musculocutaneous nerve

  
• Musculocutaneous Nerve:

  1. Arises from the ventral rami of C5, C6 and C7, the superior and middle trunks (anterior divisions) and the lateral cord
  2. In the axilla it lies lateral to the axillary artery
  3. It descends into the arm by piercing coracobrachialis (which it also innervates)
  4. It then runs distally between biceps and brachialis into the lateral side of the arm
  5. At the elbow it becomes the lateral cutaneous nerve of the forearm which emerges laterally from underneath biceps

  A) musculocutaneous nerve