Structure passes through upper triangular space:
Upper Quadrangular spaceIt has the following boundaries:- the teres major inferiorly- the long head of the triceps laterallyFor the superior border, some sources list the teres minor, while others list the subscapularis.It contains the scapular circumflex vessels.
Profunda brachii
Anterior circumflex humeral aery
Posterior circumflex humeral aery
Circumflex scapular aery