Pudendal Nerve

Question 1

Origin

Answer 1

In pelvis as one of 2 terminal branches of sacral plexus (S2, 3, 4)

Question 2

Course

Answer 2

1. Leaves pelvis through greater sciatic foramen below piriformis
2. Crosses sacrospinous ligament back to enter lesser sciatic foramen
3. Enters pudendal canal in ischiorectal fossa lateral wall accompanied by internal pudendal vessels

Question 3

End

Answer 3

Once it enters pudendal canal it gives inferior rectal nerve then divides into 2 terminal branches: 1. Perineal nerve
2. Dorsal nerve of penis (clitoris)

Question 4

Branches

Answer 4

1. Inferior rectal nerve
2. Perineal nerve
3. Dorsal nerve of penis (clitoris)

Question 5

Inferior rectal nerve

Answer 5

1. Pierces pudendal canal medial wall
2. Then crosses ischio-rectal fossa from lateral to medial
3. Supplying external anal sphincter, levator ani inferior surface, and skin around anus

Question 6

Perineal nerve

Answer 6

1. One of pudendal nerve 2 terminal branches
2. It gives:
   - Posterior scrotal (labial) branches near pudendal canal anterior end
   - Muscular branches supplying superficial and deep perineal muscles

Question 7

Dorsal nerve of penis

Answer 7

1. It runs forwards in pudendal canal
2. At canal anterior end, it enters deep perineal pouch where it pierces perineal membrane to reach superficial perineal pouch
3. Runs along penis dorsum with dorsal artery of penis