Puborectalis muscle 4473206 215550069 2008-05-28T18:20:40Z DOI bot 6652755 Citation maintenance. You can [[WP:DOI|use this bot]] yourself! Please [[User:DOI_bot/bugs|report any bugs]]. {{Infobox Muscle | Name = {{PAGENAME}} | Latin = musculus puborectalis | GraySubject = 119 | GrayPage = 424 | Image = Gray1077.png | Caption = The posterior aspect of the rectum exposed by removing the lower part of the sacrum and the coccyx. (Puborectalis not labeled, but levator ani labeled at bottom right, and sphincter ani ext labeled at bottom center.) | Image2 = Gray404.png | Caption2 = Left Levator ani from within. (Puborectalis not labeled, but 'levator ani' labeled at center, and anal canal labeled at bottom center.) | Origin = lower part of the [[symphysis pubis]], [[superior fascia of the urogenital diaphragm]] | Insertion = | Blood = | Nerve = S3, S4. levator ani nerve <ref>{{cite journal | author = Wallner C, Maas C, Dabhoiwala N, Lamers W, Deruiter M | title = Evidence for the innervation of the puborectalis muscle by the levator ani nerve. | journal = Neurogastroenterol Motil | volume = 18 | issue = 12 | pages = 1121–2 | year = 2006 | pmid = 17109696 | doi = 10.1111/j.1365-2982.2006.00846.x}}</ref> | Action = inhibit [[defecation]] | Antagonist = | DorlandsPre = m_22 | DorlandsSuf = 12550328 | }} The fibers which form a [[sling]] for the [[rectum]] are named the '''Puborectalis''' or '''Sphincter recti'''. They arise from the lower part of the [[symphysis pubis]], and from the [[superior fascia of the urogenital diaphragm]]. They meet with the corresponding fibers of the opposite side around the lower part of the rectum, and form for it a strong sling. Relaxation reduces the angle between rectum and anus, allowing defecation in conjunction with relaxation of the internal and external sphincters. Puborectalis is part of the [[levator ani]] group of muscles. ==References== <references/> ==External links== * {{MuscleLoyola|pubr}} * {{eMedicineDictionary|Puborectalis+muscle}} * {{NormanAnatomy|pelvis}} * {{SUNYAnatomyLabs|43|16|02|00}} - "The Female Pelvis: Muscles of the Pelvic Diaphragm" * {{SUNYAnatomyLabs|44|12|02|00}} - "The Male Pelvis: Muscles of the Pelvic Diaphragm" {{Muscles of trunk}} {{muscle-stub}} [[Category:Muscular system]] [[la:Musculus puborectalis]]