Triangular space lies between teres major, teres minor, and triceps long head for scapular vessels.
The triangular space is a small anatomical interval in the posterior shoulder region. Unlike the adjacent quadrangular space, it transmits only a vascular structure — the scapular circumflex artery. It serves as a key surgical and anatomical landmark in posterior shoulder dissections.
Border | Structure |
---|---|
Superior | Teres minor muscle |
Inferior | Teres major muscle |
Lateral | Long head of triceps brachii |
The triangular space and its contained vessel are part of the human-specific vascular design that supports highly mobile scapulohumeral function. The scapular anastomosis plays a role in maintaining perfusion despite positional changes or vascular compromise.