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16 Cards in this Set

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