The radial nerve exit the axilla via the triceps triangle together with the deep brachial artery (profunda brachii artery)
The “triceps triangle” is a window delineated by the teres major muscle superiorly, the long head of the triceps brachii medially and the humerus laterally (see next page)
Radial nerve (blue arrow), teres major (yellow asterix), long head of the triceps (cyan asterix), deep brachial artery (black arrow), radial nerve (green arrow)
