NCIt definition : A broad, thin muscle originating form the posterior side of the pubis body, spine
of the ischium, and pelvic fascia between the pubis and ischium on either side of
the pelvis. Both muscles unite and insert at the apex of the coccyx to form the pelvic
floor supporting the pelvic viscera and aiding in defecation.;
Alternative definition : CDISC: A group of muscles, in general extending from the inner surfaces of the ischium
and pubis to the coccyx/coccygeal vertebrae; primary function is downward and lateral
movement of the tail in tailed species, and to support the pelvic cavity.;