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16 Cards in this Set
- Front
- Back
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Obturator internus
Origin |
Pelvic surfaces of the ilium and ischium; obturator membrane
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Obuturator internus
Insertion |
Greater trochanter of femur
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Obuturator internus
Innervation |
Nerve to obturator internus
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Obuturator internus
Action |
Rotates thigh laterally, assists in holding head of femur in acetablum
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Piriformis
Origin |
Pelvic surface of 2nd and 4th sacral segments: superior margin of gerter sciatic notch and sacrotuberous ligament
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Piriformis
Insertion |
Greater trochanter of femur
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Piriformis
Innervation |
Ventral rami of S1 and S2
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Piriformis
Action |
Rotates thight laterally; abducts thigh; assists in holding head of femur in acetabulum
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Levator ani
Origin |
Body of pubis, tendinous arch of obturator fascia, and ischial spine
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Levator ani
Insertion |
Perineal body, coccyx, anococcygeal ligament, walls of prostate or vagina, rectum and anal canal
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Levator ani
Innervation |
Nerve to levator ani (branches of S4) and inferior anal (rectal) nerve and coccygeal plexus
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Levator ani
Action |
Help to support pelvic viscera and resists increases in intra-abdominal pressure
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Coccygeus
Origin |
Ischial spine
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Coccygeus
Insertion |
Inferior end of sacrum
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Coccygeus
Innervation |
Branches of S4 and S5 nerves
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Coccyggeus (ischiococcygeus)
Action |
Forms small part of pelvic diaprham that supports pelvic viscera; flexes coccyx
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