The Anatomical Spaces betwwen Scapula and Humerus ( Triangular and Quadrangular )

The Anatomical Spaces of Scapula and Humerus :

At the dorsal aspect of the scapula , between scapula and humerus ,There are two anatomical spaces . They are :

1- Triangular Space

It's bounded and situated between teres minor above , and teres major below , and bounded between teres minor medially , and long head of triceps laterally .

The circumflex scapular artery* pass throw this space .

2- Quadrangular Space

It's bounded and situated between the subscapularis and teres minor , and teres major below , and bounded between long head of triceps medially , and surgical neck of humerus laterally .

- The axillary artery , and posterior circumflex humeral vessels pass throw this space , to escape from the axilla .

  

* The circumflex scapular artery branched from subscapular artery that branched too from third from third part of axillary artery , and feeds the scapular region .  

Sources :

- Snell anatomical book ( 457 - 458 ) .
- Grants anatomical book ( 535 - 536 ) .
- Atlas of Human Anatomy, Sixth Edition- Frank H. Netter, M.D ( 418 ) . 

Written by Mubark.A.F

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