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Pelvic floor muscles have two major functions they provide 1 support or act as a floor for the abdominal viscera including the rectum and 2 constrictor or continence mechanism to the urethral, anal and vaginal orifices (in females). Here, we will discuss the relevance of pelvic floor to the anal opening and closure function, and discuss new findings with regards to the. 1 sacral nerves (a s2, b s3, c s4), 2 pudendal nerve, 3 levatory nerves, 4 inferior rectal nerves, 5 somatic innervation of the pelvic floor and external anal sphincter, 6 sympathetic trunk, 7 lumbar splanchnic nerves, 8 grey communicans nerve, 9 superior hypogastric plexus, 10 hypogastric nerves, 11 sacral splanchnic nerves, 12 inferior hypogastric plexus, 13 pelvic splanchnic nerves. Pelvic floor disorders that affect defecation consist of structural disorders such as rectocele and functional disorders such as dyssynergic defecation. Evaluation includes a good history and physical examination, a careful digital rectal exam, as well as physiological tests such as anorectal manometry, colonic transit study and balloon expulsion test. Pubococcygeus muscle arising from the pubis and its superior ramus. It passes posteriorly to insert into the anococcygeal body between the coccyx and the anal canal. Its function include pulling the coccyx forward, elevating the pelvic organs and compressing the rectum and vagina. What bony landmark on the lateral pelvic wall may be used as a reference for localizing female pelvic anatomy or pain phenomena? Coccyx ischial spine ischial tuberosity obturator canal pectineal line which statement about the pelvic floor is not correct? Along with the pelvic brim, it. After a brief technical description of mri, the anatomy of anal sphincter, rectum and pelvic floor is described. The anatomy of the anorectum and pelvic floor is well demonstrated at t2 weighted turbo spinecho sequences and all figures in this article concern this type of mri sequence. The pelvic floor or pelvic diaphragm is a sheet of muscles that support pelvic organs, e. Damage to the pelvic floor, as may occur during childbirth, can lead to development of incontinence andor prolapse. anatomy is described for the different colonic segments, rectal ampulla, upper and lower anal canal, corpus cavernosum recti, proctodeal glands, anal sphincter complex, and pelvic floor muscles. The anatomic structures mediating anal continence are highlighted. Pelvic floor exercises for faecal incontinence introduction the muscles of the pelvic floor support your rectum and the urinary bladder and play an important role in maintaining stool and urinary continence. Weakness of these muscles, together with weakness of the anal sphincter (muscles around the anal opening) may cause stool incontinence.