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

Erector spinae muscle, close-up view of thoracic portion

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Image #213-3

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

Erector spinae muscle, close-up view of thoracic portion

In this close-up view of the upper part of the specimen shown in the preceding photograph of the iliocostalis (12), longissimus (13) and spinalis (14) divisions of the erector spinae are more clearly visible.

1. Rib V
2. Fascia of serratus anterior muscle
3. Serratus anterior muscle
4. Lateral cutaneous branch of dorsal branch thoracic nerve IX
5. Serratus posterior inferior muscle (insertion into ninth rib)
6. Scapula
7. Serratus posterior superior muscle (reflected laterally)
8. Iliocostalis cervicis muscle
9. Spinous process vertebra Th. II
10. Trapezius muscle
11. Middle cutaneous branch of dorsal branch .thoracic nerve III
12. Iliocostalis muscle
13. Longissimus thoracis muscle
14. Spinalis thoracis muscle
15. Latissimus dorsi