Nerve Supply Of The Pelvic Floor

The pudendal nerve is the main nerve of the perineum.

Nerve supply of the pelvic floor. Dive into the anatomy of the pelvic muscles with our video tutorials articles quizzes and diagrams. Clinical implications of pelvic floor anatomy and nerve supply are evident. Nerve supply to the pelvic region the pelvic floor has parasympathetic sympathetic and somatic nerve supply. This cavity encloses the pelvic viscera bladder intestines and uterus in females.

The lumbosacral trunk is a nerve bundle formed by the anterior rami of l4 l5 lumbar nerves. The pelvic floor or pelvic diaphragm is composed of muscle fibers of the levator ani the coccygeus muscle and associated connective tissue which span the area underneath the pelvis the pelvic diaphragm is a muscular partition formed by the levatores ani and coccygei with which may be included the parietal pelvic fascia on their upper and lower aspects. The pelvic floor overview and function. Stemming from the 2nd through 4th sacral spinal nerves these nerves provide the parasympathtetic innervation to the pelvic organs.

To support the abdominal and pelvic viscera. The following branches of the internal iliac artery are highlighted in figure 2 below working anti clockwise from obturator artery to inferior gluteal artery. It carries sensation from the external genitalia of both sexes and the skin around the anus and perineum as well as the motor supply to various pelvic muscles including the male or female external urethral sphincter and the external anal sphincter. These nerves supply the pelvic viscera muscles of the pelvic floor and perineum gluteal region and the lower limb.

The anterior trunk gives rise to numerous branches that supply the pelvic organs the perineum and the gluteal and adductor regions of the lower limb. The coccygeal plexus of nerve fibers is formed by the 4th and 5th sacral spinal nerves and the coccygeal nerves. Muscles of the pelvic floor explore study unit. Nerves of the pelvis and perineum.

The pudendal pelvic splanchnic and pre sacral nerves s2 3 4 are the nerves responsible for maintenance of urinary continence as well as erectile function in men. A denervation of this muscle group and the consequent muscle dysfunction could result in urinary and or fecal incontinence as well as pelvic organ prolapse. This means there is both voluntary and involuntary control over the area. To a small degree the pudendal nerve s2 s4 contributes to its innervation as well.

The pelvic floor is a funnel shaped structure. In order to allow for urination and defecation there are a few gaps in the pelvic floor. The pelvic floor is a dome shaped muscular sheet separating the pelvic cavity above from the perineal region below.