Iliococcygeus muscle :-
Muscle details :-
the inner side of the ischium (the lower and back part of the hip bone) and from the posterior part of the tendinous arch of the obturator fascia, and is attached to the coccyx and anococcygeal body; it is usually thin, and may be absent, or be largely replaced by fibrous tissue. An accessory slip at its posterior part is sometimes named the iliosacralis.
ischial spine and from the posterior part of the tendinous arch of the pelvic fascia .
coccyx and anococcygeal raphe .
Nerve supply :-
levator ani nerve (S4).
inferior rectal nerve from pudendal .
supports the viscera in pelvic cavity .