Autonomic Supply

Question 1

Autonomic supply

Answer 1

1. Sympathetic chain pelvic part (one on each side)
2. Pelvic plexuses:
   - Superior hypogastric plexus (presacral nerve)
   - Right and left hypogastric (pelvic plexuses)
3. Parasympathetic supply (pelvic splanchnic nerve)

Question 2

Sympathetic chain pelvic part course

Answer 2

1. Abdominal part direct continuation
2. Crosses sacrum ala deep to common iliac vessels
3. It lies infront of sacrum anterior or medial to anterior sacral foramina
4. Both chains unite in front of coccyx forming ganglion impar

Question 3

Sympathetic chain pelvic part branches

Answer 3

Each trunk contains 4 or 5 sacral ganglia which give:
1. Lateral branches
2. Medial branches

Question 4

Lateral branches

Answer 4

Grey rami communicants to sacral & coccygeal nerves

Question 5

Medial branches

Answer 5

From first two ganglia to join inferior hypogastric plexus

Question 6

Presacral nerve site

Answer 6

Below aortic bifurcation in front of L5 vertebra body

Question 7

Presacral nerve formation

Answer 7

1. Sympathetic fibers from aortic sympathetic plexus, 3rd and 4th lumbar splanchnic nerves
2. Pelvic parasympathetic fibers

Question 8

Presacral nerve branches

Answer 8

To:
1. Inferior mesenteric plexus
2. Uretic plexus
3. Gonadal plexus
4. Common iliac plexus
5. Also gives hypogastric nerves which share in inferior hypogastric plexuses formation

Question 9

Pelvic plexuses site

Answer 9

Medial to internal iliac vessels

Question 10

Pelvic plexuses branches

Answer 10

Supplies pelvic viscera

Question 11

Formation

Answer 11

1. Right and left hypogastric nerves (mainly sympathetic) from superior hypogastric plexus
2. Branches from the first two ganglia of sympathetic chain pelvic part
3. Parasympathetic fibers from pelvic splanchnic (S2, 3, 4)

Question 12

Pelvic splanchnic nerve

Answer 12

1. From sacral plexus (S2, 3, & 4)
2. Parasympathetic ganglia are situated in pelvic organs walls
3. Postganglionic fibers supply pelvic organs and hindgut