Finish Midsagittal Study of Pelvis, Pelvic Blood and Nerve Supply, Sacral Plexus

Question 1

Where does the ureter run after stemming from the renal pelvis?

Answer 1

1. Anterior to bifurcation of common iliac vessels

2. Posterior to ductus deferens

Question 2

What are the 4 innervations of the pelvis and perineum?

Answer 2

1. Foregut: celiac plexus and ganglia (thoracic splanchnics and posterior vagal trunk)
2. Midgut: superior mesenteric plexus and ganglia (thoracic splanchnics and posterior vagal trunk)
3. Hindgut: inferior mesenteric plexus and ganglia (lumbar splanchnics [S] and pelvic splanchnics [PS])
4. Pelvis and perineum: inferior hypogastric plexus and ganglia (lumbar splanchnics via hypogastric nerve [S], sacral splanchnics [S] and pelvic splanchnics [PS]

Question 3

What is the lymphatic drainage pattern of the testes and ovaries?

Answer 3

Follow venous drainage to para-aortic (lumbar) nodes

Question 4

During vaginal exam, how can rectouterine pouch be palpated?

Answer 4

Palpate posterior vaginal fornix (space between posterior edge of cervix and posterior vaginal wall)

Question 5

What 2 structures pass through the lesser sciatic foramen?

Answer 5

1. Pudendal nerve and vessels (out greater, in lesser)

2. Obturator internus

Question 6

What is the course of the pudendal nerve and internal pudendal vessels?

Answer 6

1. Emerge from sacral plexus with S2-4 fibers
2. Enter gluteal region through greater sciatic foramen
3. Wrap around ischial spine to enter lesser sciatic foramen
4. Enter ischiorectal fossa
5. Branch into inferior rectal and posterior scrotal

Question 7

What surrounds the cervix?

Answer 7

Lateral, anterior, and posterior vaginal fornices

Question 8

What is a lumbar plexus mnemonic for nerve names?

Answer 8

Interested in getting lunch on Friday, Lucy?

iliohypogastric, ilioinguinal, genitofemoral, lateral femoral cutaneous, obturator, femoral, lumbosacral trunk

Question 9

What is a sacral plexus mnemonic for nerve names?

Answer 9

SLIPS, P

superior gluteal, lumbosacral trunk, inferior gluteal, posterior femoral cutaneous, sciatic, pudendal