Sacral nerve plexus

Question 1

Lumbosacral trunk

• what division
• path

Answer 1

APR L4,5

• ant and post
• descend over the ala of the sacrum and heads ant to piriformis

Question 2

Sup Gluteal nerve

• what div
• path

Answer 2

APR L4,5,S1

• post division
• leaves true pelvis thru suprapiriform foramen and eneters sup gluteal region

Question 3

Inf Gluteal nerve

• what div
• path

Answer 3

APR L5, S1, S2

• post div
• leaves true pelvis thru infrapiraform and enters inf gluteal region

Question 4

Nerve to quadratus femoris and inf gemellis

• what div
• path

Answer 4

APR L4, L5, S1

• ant div
• leave pelvis thru infrapiraform foramen

Question 5

Nerve to obturator internus and sup gemellus

Answer 5

APR L5, S1, S2

• ant division
• leaves pelbis thrus infrapiraform foramen

Question 6

Post cutaneous nerve of thigh

Answer 6

APR S1, S2, S3

• ant and post divisions
• leaves pelivis thru infrapiraformis space and enters gluteal region to be directed to skin of post thigh

Question 7

Pudendal nerve

Answer 7

APR S2,3,4

-ant division
s2,3,4 keep pee off the floor

Question 8

Sciatic Nerve

ant and post division APRS

Answer 8

Ant- APR l4-S3
Post- APR L4-S2

-leaves pelvis thru the infrapiraform foramen