Pelvic Floor Muscles

Question 0

Insertion of levator ani

Answer 0

Perineal body, coccyx, anococcyeal ligament, walls of prostate or vagina, rectum and anal canal

Question 1

Origin of levator ani

Answer 1

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

Question 2

Innervation of levator ani

Answer 2

Nerve at levator ani, inferior anal nerve, coccygeal plexus

Question 3

Action of levator ani

Answer 3

Helps support pelvic viscera, ressists increases in intra-abdominal pressue

Question 4

Origin of coccygeus

Answer 4

Ischial spine

Question 5

Insertion of coccygeus

Answer 5

Inferior end of sacrum and coccyx

Question 6

Innervation of coccygeus

Answer 6

Branches of S4 and S5

Question 7

Action of coccygeus

Answer 7

Forms small part of pelvic diaphragm that supports pelvic viscera, flexes coccyx

Question 8

Origin of obturator internus

Answer 8

Pelvic surface of ilium and ishium, obturator membrane

Question 9

Insertion of obturator internus

Answer 9

Greater trochanter of femur

Question 10

Innervation of obturator internus

Answer 10

Nerve to obturator internus L5-S2

Question 11

Action of obturator internus

Answer 11

Laterally rotates hip joint, assists holding head of femur in acetabulum

Question 12

Origin of piriformus

Answer 12

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

Question 13

Insertion of piriformus

Answer 13

Greater trochanter of femur

Question 14

Innervation of piriformus

Answer 14

Anterior rami of S1 and S2

Question 15

Action of piriformus

Answer 15

Laterally rotates hip joint, abducts hip joint, assists inholding head of femur in acetabulum