The lumbrosacral plexus

Question 1

the aorta divides the right and left common iliac arteries at the

Answer 1

L4 vertebral column level

Question 2

the common iliac descend along the pelvic brim and bifurcate into the

Answer 2

external and internal iliac arteries

Question 3

each external iliac arteries eventually passes beneath the inguinal ligament and becomes the

Answer 3

femoral artery

Question 4

the lumbosacral plexus is formed by a collection of _____

Answer 4

ventral rami of the lumber and sacral spinal nerves

Question 5

anterior division of the internal iliac artery gives rise to branches that supply the

Answer 5

pelvic viscera, structures in the perineum, and some of the gluteal region

Question 6

all the muscles and structures associated within the limb are innervated by the

Answer 6

lumbrosacral plexus

Question 7

Sacral plexus is formed by the ventral rami of ___ and the associated nerves which arise from ____

Answer 7

L4, L5 and S1 to S4 these ventral rami

Question 8

sciatic nerve

Answer 8

large nerve formed by union L4, L5 and S1, S2, and S3 which exits the “greater sciatic foramen” and innervates many muscles throughout the lower limb

Question 9

L4, L5, S1 - exits the greater sciatic foramen and innervates gluteus medius

Answer 9

superior gluteal nerve

Question 10

L5, S1 & S2- exits the greater sciatic foramen (innervates gluteus maximus

Answer 10

inferior gluteal nerve

Question 11

S1, S2 & S3- cutaneous (sensory) innervation to the posterior thigh region

Answer 11

posterior femoral cutaneous nerve

Question 12

S2, S3, S4- exits greater sciatic foramen the enters the lesser sciatic foramen (innervates the perineum)

Answer 12

pedundal nerve

Question 13

small nerves that arise from the sacral plexus

Answer 13

Nerve to the Obturator Internus and the Nerve to Quadratus Femoris

Question 14

lumbar plexus

Answer 14

Question 15

obturator artery

Answer 15

innervates the medial thigh muscles

Question 16

internal pudendal

Answer 16

arterial supply to the perineum/external genitals

if it says internal, thats referring to the arty and not the nerve, there is no internal pedundal nerve

Question 17

lumbosacral trunk

Answer 17

ventra rami of part of L4 and all of L5 that converge to join S1-S3 and ultimately makes sciatic nerve

Question 19

the sacral plexus is attached to

Answer 19

piriformis muscle

Question 20

superior gluteal artery exits between which nerves

Answer 20

lumbosacral trunk and S1 of the lumbosacral plexus

Question 21

largest nerve in body

Answer 21

sciatic nerve

Question 22

ventral rami of L2, L3, L4 converge to form

Answer 22

the femoral nerve

Question 23

genital branch of genitofemoral nerve innervates

Answer 23

traverses thorugh deep and superficial ring and traverses cremasteric fascia

Question 24

Answer 24

Question 25

Answer 25

Question 26

Answer 26

Question 27

Answer 27

obturator internus - forms lateral/side wall of pelvic cavity

Question 28

Answer 28

Question 29

Answer 29

lateral femoral cutaneous nerve