intermuscular spaces 5 marker 😃😃

# 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