Muscles of pelvis & perineum Flashcards
Origin of Coccygeus
Ischial spine
Insertion of Coccygeus
Side of coccyx
Lower Sacrum
Action of Coccygeus
Elevates pelvic floor
Origin of iliococcygeus
Arcus tendineus levator ani
Ischial Spine
Insertion of iliococcygeus
Coccyx
Anococcygeal raphe
Action iliococcygeus
Elevates pelvic floor
Origin of Levator Ani
Posterior surface of body of pubis
Fascia of obturator internus
Ischial spine
Insertion of Levator Ani
Coccyx
Anococcygeal raphe
Action of Levator Ani
Elevates pelvic floor
Origin of Pubococcygeus
Posterior aspect of superior pubic ramus
Insertion of Pubococcygeus
Coccyx
Action of Pubococcygeus
Elevates pelvic floor
Origin of Puborectalis
Posterior aspect of the body of the pubis
Insertion of Puborectalis
Unites with puborectalis muscle of other side posterior to rectum
Action of Puborectalis
Draws the distal rectum forward and superiorly
Aids in voluntary retention of feces
Origin of Deep Transverse Perineus
Medial surface of ischial ramus
Insertion of Deep Transverse Perineus
Contralateral muscle and perineal body
Action of Deep Transverse Perineus
Fixes and stabilizes perineal body
Origin of Superficial Transverse Perineus
Medial Surface of Ischial Ramus
Insertion of Superficial Transverse Perineus
Contralateral muscle and perineal body
Action of Superficial Transverse Perineus
Fixes and stabilizes perineal body
Origin of External Anal Sphincter
Perineal body or central tendinous point of perenieum
Insertion of External Anal Sphincter
Encircles the anal canal ;
Superficial fibers attach to the coccyx
Action of External Anal Sphincter
Constricts the anal canal
Origin of Internal Anal Sphincter
Encircles anal canal
Insertion of Internal Anal Sphincter
Encircles anal canal
Action of Internal Anal Sphincter
Constricts anal canal
