▁body ▁is ▁essential ▁for ▁the ▁integrity ▁of ▁the ▁pel vic ▁floor , ▁particularly ▁in ▁females . ▁Its ▁ru pt ure ▁during ▁v ag inal ▁birth ▁leads ▁to ▁w iden ing ▁of ▁the ▁gap ▁between ▁the ▁anterior ▁free ▁borders ▁of ▁lev ator ▁ani ▁mus cle ▁of ▁both ▁sides , ▁thus ▁pre dis pos ing ▁the ▁woman ▁to ▁pro lapse ▁of ▁the ▁u ter us , ▁rect um , ▁or ▁even ▁the ▁ur inary ▁bl ad der . ▁ ▁At ▁this ▁point , ▁the ▁following ▁mus cles ▁conver ge ▁and ▁are ▁attached : ▁ 1 . ▁External ▁anal ▁s ph inct er ▁ 2 . ▁Bul b osp ong ios us ▁mus cle ▁ 3 . ▁Super f icial ▁trans verse ▁per ine al ▁mus cle ▁ 4 . ▁An terior ▁fib ers ▁of ▁the ▁lev ator ▁ani ▁ 5 . ▁F ib ers ▁from ▁male ▁or ▁female ▁external ▁ur inary ▁s ph inct er ▁ 6 . ▁Deep ▁trans verse ▁per ine al ▁mus cle ▁ ▁F as cia ▁The ▁termin ology ▁of ▁the ▁per ine al ▁fas cia ▁can ▁be ▁confusing , ▁and ▁there ▁is ▁some ▁controvers y ▁over ▁the ▁nom en cl ature . ▁ ▁This ▁st ems ▁from ▁the ▁fact ▁that ▁there ▁are ▁two ▁parts ▁to ▁the ▁fas cia , ▁the ▁super f icial ▁and ▁deep ▁parts , ▁and ▁each ▁of ▁these ▁can ▁be ▁sub div ided ▁into ▁super f icial ▁and ▁deep ▁parts . ▁ ▁The ▁layers ▁and ▁contents ▁are ▁as ▁follows , ▁from ▁super f icial ▁to ▁deep :