LKnative - Musculocutaneous nerve block

4 – Anatomy: The trajectory of the MC nerve in the distal half of the arm and the motor innervation

Proximally in the arm, the MC nerve runs in the fascial plane between the coracobrachial and the short head of the biceps brachii muscles

Distally in the arm, the ramifications of the MC nerve run in the fascial plane between the brachialis and the biceps brachii muscles

The MC nerve innervates the flexor muscles of the elbow:

– the coracobrachial muscle

– the biceps brachii muscle

– the brachialis muscle

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Musculocutaneous (MC) nerve (cyan arrows), the lateral antebrachial cutaneous nerve from the MC nerve (magenta arrow), coracobrachial muscle (green asterix), biceps brachii muscle (red asterix), tendon of the short and long heads of the biceps brachii muscle (green and red arrows), brachialis muscle (cyan asterix)