<prompt> Structure passes through upper triangular space:Profunda brachiiAnterior circumflex humeral aeryPosterior circumflex humeral aeryCircumflex scapular aery  <response>: 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. 