Puborectalis muscle

The musculus puborectalis ( " pubic rectum muscle ") is a striated muscle of the pelvic floor and part of the levator ani.

It rises on the back of the pubic bone and forms a sling around the rectum at the transition to the anal canal and thus leads to the bend of the rectum in the field of anorectal Linea. It acts as a sphincter of the rectum and is therefore also called sphincter recti. During defecation relaxes the muscle, so that the bend between the rectum and the anal canal and passes Kotsäule can be transported further to the rear. Innervation via the sacral plexus via nerve fibers of the segments S3 and S4 of the spinal cord.

An injury or a loss of function lead to a partial fecal incontinence. In severe perineal tears can be maintained over this muscle is a partial preservation of the chair holding capacity.