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

Rotator, interspinal and intertransverse muscles in lumbar region

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Image #214-5
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Dissection of thoracic and lumbosacral regions of back from a posterior approach
Rotator, interspinal and intertransverse muscles in lumbar region
The erector spinae and multifidus muscles have been nearly completely excised from the lumbar region.
1 . Medial intertransverse muscle
2 . Lateral intertransverse muscle (several fascicles present)
3 . Dorsal branch thoracic nerve XII
4 . Rib XII
5 . Aponeurosis transversus abdominis muscle
6 . Thoracolumbar fascia (upper pointer, middle layer; lower pointer, posterior layer, cut off)
7 . Transversus abdominis muscle
8 . Quadratus lumborum muscle (covered by thoracolumbar fascia)
9 . Upper pointer: Longissimus muscle Lower pointer: Iliocostalis lumborum muscle
10 . Iliac crest
11 . Superior cluneal nerves
12 . Gluteus medius muscle
13 . Gluteus maximus muscle
14 . Posterior superior iliac spine
15 . Spinous process vertebra L. II
16 . Intervertebral joint capsule
17 . Interspinalis lumborum muscle
18 . Transverse process of vertebra L. IV
19 . Thoracolumbar fascia (posterior layer)
20 . Rotator muscles
21 . Spinous process vertebra L. V
22 . Upper pointer: Lamina (arch of vertebra) L. V Lower pointer: Intervertebral joint capsule L. V - S. I
23 . Arch sacrum