musculocutaneous nerve

LAC divides into

LAC anterior and LAC posterior branch

LAC pathway

LAC exits 2-5 cm proximal to the elbow crease between the brachialis fascia and the thick biceps aponeurosis

musculocutaneous nerve continues between

axillary artery and the median nerve

musculocutaneous nerve innervates

coracobrachialis muscle and sends branches to the biceps and brachialis muscles

musculocutaneous nerve palpation

difficult

musculocutaneous nerve originates

from the lateral cord of the brachial plexus near the inferior border of the pectoralis minor

musculocutaneous nerve terminates as the

lateral antebrachial cutaneous nerve (LAC)

musculocutaneous nerve

nerve roots C5 & C6

LAC role is

purely sensory

LAC innervates

radial half of the volar forearm and radial third of the dorsal forearm

musculocutaneous nerve enters

upper arm by passing obliquely through the coracobrachialis muscle and between the biceps and brachialis muscles