Test 3 musclesof pelvic walls and floor Flashcards Preview

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Flashcards in Test 3 musclesof pelvic walls and floor Deck (16):
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levator ani (pubococcygeus and iliococcygeus) origin

-body of pubis
-tendonous arch of levatorani
-ischial spine

1

levator ani (pubococcygeus and iliococcygeus) insertion

-perineal body
- coccyx
-anococcygeal ligament
-walls of protate or vagina
-rectum
-annal cannal

2

levator ani (pubococcygeus and iliococcygeus) innervation

-nerve to levator ani (branches of S4)
-inferior anal (rectal nerve)
-coccygeal plexus

3

levator ani (pubococcygeus and iliococcygeus) actions

-helps support pelvic viscera
-resist increases in intra-abdominal pressure

4

coccygeus (ishococcygeus) origin

ischial spine

5

coccygeus (ishococcygeus) insertion

inferior end of sacrum

6

coccygeus (ishococcygeus) innervation

branches of S4 and S5 nerves

7

coccygeus (ishococcygeus) action

-forms small part of pelvic diaphragm that supports pelvic viscera
-flexes cocccyx

8

obturator internus origin

-pelvic surface of ilium and ischium
-obturator membrane

9

obturator internus insertion

greater trochanter of femur

10

obturator internus innervation

nerve to obtrurator internus (L5 S1 S2)

11

obturator internus action

-rotates thigh laterally
-assists in holding head of femur in acetabulum

12

piriformis origin

-pelvic surface of 2nd-4th sacral segments
-superior margin of greater sciatic notch and sacrotuberous ligament

13

piriformis insertion

greater trochanter of femur

14

piriformis innervtion

anterior rami of S1 and S2

15

piriformis action

-rotates thigh laterally
-abducts thigh
-assits in holding head of femur in acetabulum