Ligaments and joints of lumbosacral spine and pelvic girdle

Ligaments of sacral region, posterior view

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Image #155-3
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Ligaments and joints of lumbosacral spine and pelvic girdle
Ligaments of sacral region, posterior view
The central area of the dissection shown in the preceding view is illustrated in this close-up photograph.
1 . Supraspinous ligament
2 . Transverse process vertebrae L. V (periosteum removed)
3 . Iliolumbar ligament
4 . Iliac crest
5 . Posterior superior iliac spine
6 . Dorsal sacral foramina (partially obscured by ligamentous bands note vessels and nerves emerging between bands)
7 . Superior gluteal artery (cut off)
8 . Sciatic nerve (exposed by excision of piriform muscle)
9 . Inferior gluteal artery (cut off)
10 . Internal pudendal artery
11 . Sacrospinous ligament (blended with coccygeus muscle)
12 . Spinous process vertebrae L. V
13 . Intervertebral joint capsule
14 . Gluteus medius muscle
15 . Dorsal sacroiliac ligament
16 . Middle sacral crest
17 . Piriform muscle
18 . Sacrotuberous ligament
19 . Sacral horn
20 . Superficial dorsal sacrococcygeal ligament