At the axillary crease, the musculocutaneous (MC) nerve is still close to the axillary/brachial artery and the median and ulnar nerves in the medial bicipital groove
The MC nerve is sandwiched in the fascial plane between the short head of the biceps brachii muscle and the coracobrachial muscle
Musculocutaneous nerve (cyan arrows), median nerve (red arrows), ulnar nerve (green arrows), radial nerve (magenta arrows), short head of the biceps brachii muscle (white asterix), coracobrachial muscle (green asterix), triceps brachii muscle (cyan asterix)