Muscles of Pelvic Walls and Floor

Question 0

Insertion of Levator Ani

Answer 0

Perineal body, coccyx, anococcygeal ligament, walls of prostate or vagina, rectum, 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 to Levator ani (branches of S4), inferior anal(rectal) nerve, coccygeal plexus

Question 3

Action of Levator Ani

Answer 3

Helps support pelvic viscera; resists increases in intraabdominal pressure

Question 4

Origin of Coccygeus

Answer 4

Ishial 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 nerves

Question 7

Action of Coccygeus

Answer 7

Forms small part of pelvic diaphragm that supports pelvic viserca; flexes coccyx