Introduction
36 + 37
Extrinsic /Superficial layer :
superficial layer
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① Trapizues m.
- N: Accessory nerve (XI) & spinal nerves C3-C4
- B.S : Transverse cervical art.
② Latissimus dorsi
- O :
- → Spinous processes T7 - S5
- → Thoracolumbar fascia
- → iliac spine & iliac crest
- → 10th - 12th ribs
- → inferior angle of scapula
- I : Humerus - crest of lesser tubercle.
- N: Thoracodorsal nerve.
- B.S : Thoracodorsal art.
③ Rhomboid minor
- O: Spinous processes C6-C7
- I : Scapula
- N: dorsal scapular n.
- F: elevation the scapula
- B.S : Dorsal scapular art.
④ Rhomboid major
- O : spi. p : T1-T4
- I : Scapula
- N : Dorsal scapular n.
- F : elevation the scapula
- B.S : Dorsal scapular art.
⑤ levator scapula m.
- O : Transverse proce- : C1-C4
- I : Scapula - supe. angle
- N : spinal nerves + dorsal scapular n.
- F : elevation of the scapula.
- B.S : Dorsal scapular art.
⑥ Serratus post. superior
- O : spinous process : C6-T2 (4)
- I : 2nd - 5th ribs
- N : intercostal n.
- F : elevation of the ribs
- B.S : post. intercostal art.
Intermediate muscles
⑦ Serratus post. infer. :
- O : T11 - L2 (4)
- I : 9th - 12th ribs
- N : intercostal n.
- B.S : Subcostal (branch of ant. intercostal) + upper lumber arteries.