All of the following structures forms the border of Quadrangular space, EXCEPT?

Structures forming the borders of Quadrangular space are teres major and teres minor muscles, long head of the triceps brachii muscle, and the humerus. Contents of this space are: axillary nerve and the posterior circumflex humeral aery. Structures forming the border of triangular space are:Teres major and teres minor muscles and the long head of the triceps brachii muscle.Its contents is Circumflex scapular aery.