Dissection of thoracic and lumbosacral regions of back from a posterior approach

Fascia of rhomboid muscles; nerve supply to trapezius muscle

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Image #212-4
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Dissection of thoracic and lumbosacral regions of back from a posterior approach
Fascia of rhomboid muscles; nerve supply to trapezius muscle
The external layer of muscles of the back and left shoulder has been exposed bilaterally. The left trapezius has been reflected laterally from its spinal origin to reveal the layer of fascia between it and the deeper-lying rhomboid muscles. The accessory nerve has been dissected along the deep surface of the trapezius.
1 . Origins of trapezius muscle (cut across)
2 . Cervical surface of superficial fascia
3 . Accessory nerve (XI)
4 . Trapezius muscle (reflected laterally)
5 . Acromion
6 . Branch of transverse colli artery to trapezius (divided in reflecting trapezius)
7 . Deltoid muscle
8 . Lateral brachial cutaneous nerve
9 . Intercostobrachial nerve
10 . Teres major muscle
11 . Triceps brachii muscle
12 . Spinous process vertebra C. VII
13 . Trapezius muscle
14 . Rhomboid major muscle
15 . Erector spinae muscle (beneath thoracolumbar fascia)
16 . Triangle of auscultation
17 . Latissimus dorsi muscle