Bassett Collection of Stereoscopic Images of Human Anatomy

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Exploration of gluteal region and hip

Piriformis and obturator muscles, posterior view of right side

Image #181-4

KEYWORDS: Bones joints cartilage, Muscles and tendons, Thigh.

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Higher resolution images are available for a fee. Contact Drew Bourn, PhD, MLIS.

Exploration of gluteal region and hip

Piriformis and obturator muscles, posterior view of right side

This dissection has been photographed to illustrate the relations of the piriformis and the obturator internus and externus muscles to the capsule of the hip joint and to the bony pelvis and femur.

1 .	Median sacral crest
2 .	Sacral horn
3 .	Coccygeal horn
4 .	Superficial posterior sacrococcygeal ligament
5 .	Coccyx bone
6 .	Sacrotuberous ligament (cut off)
7 .	Sacrospinous ligament
8 .	Nerve to obturator internus muscle
9 .	Obturator internus muscle
10 .	Ischial tuberosity
11 .	Body of pubis
12 .	Quadratus femoris muscle (cut off)
13 .	Hip articular capsule
14 .	Iliopsoas muscle (tendon of insertion)
15 .	Lesser trochanter
16 .	Infrapiriform foramen
17 .	Piriform muscle
18 .	Ilium
19 .	Tubercle of iliac crest
20 .	Upper pointer: Tendon of obturator internus muscle Lower pointer: Inferior gemellus muscle (note absence of a superior gemellus muscle)
21 .	Greater trochanter
22 .	Tendon of insertion of obturator externus muscle
23 .	Quadrate tubercle
24 .	Neck of femur
25 .	Trochanter tertius