17.3.19

Quadrangular space

Quadrangular space


The quadrangular space (or quadrilateral space [of Velpeau] or foramen humerotricipitale) is one of the three spaces in the axillary space. The other two spaces are: triangular space and triangular interim.

Limits

It is limited by:


  • above/unrivaled: the teres minor (substandard edge). 


  • beneath/substandard: the teres real (prevalent edge) 
  • medially: the long leader of the triceps brachii (horizontal edge) 
  • horizontally: the careful neck of the humerus 
  • anteriorly: the subscapularis 


Contents:

It transmits the axillary nerve and back circumflex humeral vessels (corridor and vein).

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