PMC3123001_01
Dissection showing the variation of radial nerve (DL: deltoid; LoHT, LtHT and MHT: Long, lateral and medial head of triceps brachii, respectively; 1: radial nerve; 2, 3, 4: branches to LoHT, LtHT and MHT, respectively; 5: profunda brachii vessels; 6: lower lateral cutaneous nerve of arm; 7: posterior cutaneous nerve of forearm)
JNRP-2-74-g001.jpg
PMC3123001_01_JNRP-2-74-g001.jpg
F1
The lower lateral cutaneous nerve of arm was emerging from the lateral head of triceps brachii while the posterior cutaneous nerve of the forearm was emerging from the medial head of triceps brachii muscle [Figure 1].
Dissection showing the variation of musculocutaneous nerve (BBr: biceps brachii; CBr: coracobrachialis; BR: brachialis; BRd: brachioradialis; ECRL: extensor carpi radialis longus; ECRBr: extensor carpi radialis brevis; 1: musculocutaneous nerve; 2: branch to BR; 3: lateral cutaneous nerve of the forearm; 4 and 5: branches to BRd and ECRL, respectively; 6: branch to ECRBr; 7: deep branch; 8: superfi cial branch)
JNRP-2-74-g002.jpg
PMC3123001_01_JNRP-2-74-g002.jpg
F2
The musculocutaneous nerve had also given a branch to extensor carpi radialis longus just above the medial epicondyle and to the extensor carpi radialis brevis muscle just below the medial epicondyle [Figure 2]. Then, about 7 cm distal to the medial epicondyle, the musculocutaneous nerve bifurcated into deep and superficial branches [Figure 2].