At the level of the elbow the median nerve runs medial to the brachial artery
Below the elbow the median nerve descends in the midline without an adjacent artery; it runs under the short head of the biceps brachii muscle and the tendon of the biceps brachii muscle and between the two head of the pronator teres to the forearm
The short head of the biceps brachii muscle and the biceps brachii tendon as well as the pronator teres muscle have been removed in the picture on the right to expose the median nerve
The brachialis muscle is highlighted with orange colour; brachioradial muscle (cyan asterix), long head of the biceps brachii muscle (green asterix)
Median nerve (blue arrow), brachial artery (green arrow – just before it branches into the radial and ulnar arteries), brachial vein (cyan arrow – just before it branches into the radial and ulnar veins), cephalic vein (magenta arrows), basilic vein (black arrows), median cubital vein (yellow arrows). L = lateral, M = medial.
