PUDENDAL NERVE

 

ORIGIN: Sacral plexus (S2-4).

COURSE/DISTRIBUTION: This very important nerve of the pelvis and perineum takes its origin from the sacral plexus and descends to the greater sciatic foramen in order to escape from the pelvic cavity. It then winds at the back of the ischial spine accompanied by the nerve to obturator internus and the internal pudendal artery, to re-enter the pelvis through the lesser sciatic foramen to reach the pudendal canal of the ischiorectal fossa. It transverses the deep perineal space and pierces the perineal membrane in order to escape from the deep space and then divides into its two terminal branches- dorsal and deep arteries of penis or clitoris.

It is also gathered from clinical evidence that the pudendal nerve supplies at the least the lower part of the vagina for anaesthetic blockage of this nerve called pudendal block allows many procedures to be performed on the vagina painlessly, the fibers probably running with the inferior rectal nerve.

BRANCHES: 

bulletMuscular branches- a prominent nerve is a branch of the muscular branch to the bulbospongiosus- nerve to the urethral bulb.
bulletInferior rectal nerve
bulletPerineal nerve- which provides most of muscular branches to perineal muscles
bulletTerminal branches are
  1. Dorsal nerve of penis/clitoris
  2. Deep nerve of penis/clitoris

ROOT VALUE:  S2-4.

 
 
Transperineal pudendal nerve decompression

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Electronic School of Medicine
Creator: Oluwole Ogunranti


 

 

 

 

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Electronic School of Medicine
Creator: Oluwole Ogunranti

Electronic School of Medicine
Creator: Oluwole Ogunranti