Pelvic Diaphragm Muscles

Question 1

What are the 3 parts that make up the Levator ani?

Answer 1

Puborectalis
Pubococcygeus
Iliococcygeus

Question 2

Origin of Puborectalis (Levator ani)

Answer 2

Superior pubic ramus (both sides of pubic symphysis)

Question 3

Insertion of Puborectalis (Levator ani)

Answer 3

Anococcygeal ligament

Question 4

Innervation of Levator ani

Answer 4

Direct branches of sacral plexus (S4), inferior anal n.

Question 5

Action of Levator ani

Answer 5

Supports pelvic viscera

Question 6

Origin of Pubococcygeus

Answer 6

Pubis (lateral to origin of puborectalis)

Question 7

Insertion of Pubococcygeus (Levator ani)

Answer 7

Anococcygeal ligament, coccyx

Question 8

Origin of Iliococcygeus (Levator ani)

Answer 8

Internal obturator fascia of levator ani (tendinous arch)

Question 9

Insertion of iliococcygeus

Answer 9

Anococcygeal ligament, coccyx

Question 10

Origin of Coccygeus

Answer 10

Sacrum (inferior end)

Question 11

Insertion of Coccygeus

Answer 11

Ischial spine

Question 12

Innervation of Coccygeus

Answer 12

Direct branches from sacral plexus (S4-S5)

Question 13

Action of Coccygeus

Answer 13

Supports pelvic viscera, flexes coccyx

Question 14

What are the 2 muscles of the pelvic diaphragm?

Answer 14

Levator ani and Coccygeus