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tonicity of this muscle as other muscle is maintained by pudendal nerve, wich keep it closed (normaly), and when stuff are full in rectum and being forced by yourself (valsava manuever) so that to get out, then this is willing open of this muscle. so if u damage pudendal, simply means u gona have the anal. OBJECTIVE: Stimulation of the pudendal nerve or the anal sphincter could provide therapeutic options for fecal incontinence with little involvement of other organs. The goal of this project was to assess the effects of pudendal nerve and anal sphincter stimulation on bladder and anal pressures. DESIGN: Te n virgin female. It also controls the external anal sphincter and the sphincter muscles of the bladder. Image-guided pudendal nerve block is the most important diagnostic test following history and physical examination for patients with suspected pudendal neuralgia. The nerve is blocked by a local anesthetic to see if symptoms can be. The pudendal nerve originates from the lumbo-sacral plexus (L4-S4). It consists of both sensory fibers (80%) and motor fibers (20%). The pudendal nerve branches into 3 smaller nerves: Inferior rectal nerve: supplies the anal canal, peri-anal skin, rectum, and external anal sphincter. Perineal nerve: supplies the perineum. In the pudendal canal, the perineal nerve gives off both deep and superficial branches. The deep branch of the perineal nerve pierces the medial wall of the pudendal canal and goes on to innervate the levator ani and the external anal sphincter. After this, the deep branch passes to supply the bulbospongiosus. The pudendal nerve is the main nerve of the perineum It carries sensation from the external genitalia of both sexes and the skin around the anus and perineum, as well the motor supply to various pelvic muscles, including the male or female external urethral sphincter and the external anal sphincter. If damaged, most Structure · Function · Clinical significance · Damage. When the nerves and muscles perform normally, we have control of bladder and bowel functions without discomfort. A problem with pudendal nerve function may lead to loss of control of the anal sphincter muscles. Such problems may cause leakage. Dis Colon Rectum. Jul;52(7) doi: /DCR.0befd. Effects of sphincterotomy and pudendal nerve transection on the anal sphincter in a rat model. Zutshi M(1), Salcedo LB, Zaszczurynski PJ, Hull TL, Butler RS, Damaser MS. Author information: (1)Department of Colorectal Surgery, Cleveland. The external anal sphincter (EAS), innervated by the pudendal nerve, is the best muscle for detection of neuropathic lesions in lower sacral myotomes. Its circular superficial location and muscle bulk allows for easier access and less painful needle insertion in order to diagnose particularly proximal sacral.