Test 3 musclesof pelvic walls and floor

Question 0

levator ani (pubococcygeus and iliococcygeus) insertion

Answer 0

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

Question 1

levator ani (pubococcygeus and iliococcygeus) origin

Answer 1

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

Question 2

levator ani (pubococcygeus and iliococcygeus) innervation

Answer 2

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

Question 3

levator ani (pubococcygeus and iliococcygeus) actions

Answer 3

• helps support pelvic viscera

- resist increases in intra-abdominal pressure

Question 4

coccygeus (ishococcygeus) origin

Answer 4

ischial spine

Question 5

coccygeus (ishococcygeus) insertion

Answer 5

inferior end of sacrum

Question 6

coccygeus (ishococcygeus) innervation

Answer 6

branches of S4 and S5 nerves

Question 7

coccygeus (ishococcygeus) action

Answer 7

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

Question 8

obturator internus origin

Answer 8

• pelvic surface of ilium and ischium

- obturator membrane

Question 9

obturator internus insertion

Answer 9

greater trochanter of femur

Question 10

obturator internus innervation

Answer 10

nerve to obtrurator internus (L5 S1 S2)

Question 11

obturator internus action

Answer 11

• rotates thigh laterally

- assists in holding head of femur in acetabulum

Question 12

piriformis origin

Answer 12

• pelvic surface of 2nd-4th sacral segments

- superior margin of greater sciatic notch and sacrotuberous ligament

Question 13

piriformis insertion

Answer 13

greater trochanter of femur

Question 14

piriformis innervtion

Answer 14

anterior rami of S1 and S2

Question 15

piriformis action

Answer 15

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