Shoulder

Quadrangular and triangular spaces, close-up view

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Image #93-7

Shoulder

Quadrangular and triangular spaces, close-up view

1. Teres minor muscle (fused with infraspinatus muscle)
2. Upper pointer: Branch axillary nerve (to deltoid muscle, previously removed) Lower pointer: Quadrangular space
3. Muscular branch axillary nerve (to teres minor muscle)
4. Posterior circumflex artery of humerus (cut off)
5. Lateral brachial cutaneous (cut off)
6. Triceps brachii (lateral head)
7. Triceps brachii muscle (long head)
8. Infraspinatus
9. Circumflex artery of scapula
10. Triangular space
11. Teres major muscle
12. Serratus anterior muscle