Bassett Collection of Stereoscopic Images of Human Anatomy

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Pectoral region and axilla

Left axilla (continued); relations of structures in posterior part of axillary fossa

Image #90-5

KEYWORDS: Axilla, Fascia ligaments and tendons, Neuralnetwork, Peripheral nervous system, Vasculature.

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Pectoral region and axilla

Left axilla (continued); relations of structures in posterior part of axillary fossa

The structures in the posterior part of the axilla have been exposed and are shown in relation to vessels and nerves already encountered. A distinct fascial lamina (21) is present in the cleft between the serratus anterior and subscapular muscles. Each of these muscles is also covered by its own fascia.

1 .	Suprascapular nerve
2 .	Subscapular nerve
3 .	Posterior cord of brachial plexus
4 .	Lateral cord of brachial plexus
5 .	Anterior lateral thoracic nerve
6 .	Upper pointer: Thoracoacromial artery (cut off) Lower pointer: Anterior medial thoracic nerve
7 .	Upper pointer: Communicating loop between medial and lateral anterior thoracic nerves Lower pointer: Supreme thoracic artery
8 .	Axillary artery and vein
9 .	Intercostobrachial nerve
10 .	Biceps brachii muscle (short head)
11 .	Axillary nerve
12 .	Musculocutaneous nerve
13 .	Medial and lateral heads of median nerve
14 .	Lateral thoracic artery
15 .	Lymph vessel
16 .	Upper pointer: Subscapular artery (accompanied by subscapular vein) Lower pointer: Teres major muscle (covered by fascia)
17 .	Thoracodorsal nerve
18 .	Axillary lymph nodes (lateral group)
19 .	Long thoracic nerve
20 .	Latissimus dorsi muscle
21 .	Fascial layer (see text above)