Muscles of Pelvic Wall and Floor Flashcards

0
Q

Coccygeus (ishiococcygeus)

A

Origin: Ischial spine

Insertion: Inferior end of sacrum

Insertion: branches of S4 and S5

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1
Q

Levator Ani (pubo/ilio)

A

Origin: Body of pubis, tendinous arch of levator ani, ischial spine

Insertion: Perineal body, coccyx, anococcygeal ligament, walls of prostate or vagina, rectum, anal canal

Innervation: Nerve to levator ani (branches of S4), inferior anal (rectal nerve) coccygeal plexus

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2
Q

Obturator Internus

A

Origin: Pelvic surface of ilium and ischium, obturator membrane

Insertion: Greater trochanter of femur

Innervation: Nerve to Obturator internus (L5-S2)

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3
Q

Piriformis

A

Origin: Pelvic surface of 2nd-4th sacral segments; superior margin of greater sciatic notch and sacrotuberous ligament

Insertion: Greater trochanter of femur

Innervation: Anterior rami of S1,2

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