Bassett Collection of Stereoscopic Images of Human Anatomy

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KEYWORDS: Lumbar region, Muscles and tendons, Sacral region, Thoracic region, Vertebral column.

Stanford holds the copyright to the David L. Bassett anatomical images and has assigned Creative Commons license Attribution-Share Alike 4.0 International to all of the images.

For additional information regarding use and permissions, please contact Dr. Drew Bourn at dbourn@stanford.edu.

Ligaments and joints of lumbosacral spine and pelvic girdle

Ligaments of lumbosacral region, posterior view

The erector spinae and gluteus maximus muscles have been removed. On the left the gluteus medius has been cut away.

1 .	Erector spinae muscle (cut across)
2 .	Supraspinous ligament
3 .	Intertransverse ligament
4 .	Quadratus lumborum muscle (covered by middle layer of thoracolumbar fascia)
5 .	Left kidney (faintly visible through thoracolumbar and renal fascia)
6 .	Transverse process of vertebra L. IV
7 .	Latissimus dorsi muscle (cut edge)
8 .	Iliolumbar ligament
9 .	Iliac crest
10 .	Area of origin of gluteus medius muscle
11 .	Gluteus minimus muscle
12 .	Piriform muscle (cut across)
13 .	Sciatic nerve (emerging through greater sciatic foramen)
14 .	Upper pointer: Internal pudendal artery Lower pointer: Pudendal nerve
15 .	Obturator internus muscle (tendon of insertion)
16 .	Greater trochanter of femur
17 .	Thoracolumbar fascia (posterior layer, reflected)
18 .	Intervertebral joint capsule L. IV-V
19 .	Median sacral crest
20 .	Posterior superior iliac spine
21 .	Gluteus medius muscle
22 .	Dorsal sacroiliac ligament
23 .	Piriform muscle
24 .	Sacrotuberous ligament
25 .	Ischiorectal fossa
26 .	Dorsal superficial sacrococcygeal ligament
27 .	Coccyx