intermuscular spaces 5 marker πŸ˜ƒπŸ˜ƒ

# QUADRANGULAR SPACE 

Boundaries - 
Superior -  inferor border of teres major 
Inferior- superior border of teres major
Medial- lateral border of long head of triceps brachii muscle
Lateral- surgical neck of humerus



Content
1) axillary nerve
2) posterior circumflex humeral vessels



# UPPER TRIANGULAR SPACE 


 Boundaries - 
Medial - teres major 
Inferior- teres major 
Lateral - long head of triceps brachii muscle


Content
Circumflex scapular artery



# Lower triangular space


Boundaries
Medial- long head of triceps brachii muscle
Lateral- medial border of humerus
Superior- teres major

Content
1) radial nerve
2) profunda brachii vessels


Diagram

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