「 The triangular space ( also known as the medial triangular space,[1] upper triangular space,[2] medial axillary space or foramen omotricipitale[3] ) is one of the three spaces found at the axillary space. The other two spaces are the quadrangular space and the triangular interval.[4]
【 Boundaries 】
It has the following boundaries:
・ Inferior : the superior border of the teres major;
It contains the scapular circumflex vessels.[7]
Unlike the quadrangular space or the triangular interval, no major nerve passes through the triangular space. 」