Exam 3: Lumbar Spinal Nerves Flashcards Preview

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Flashcards in Exam 3: Lumbar Spinal Nerves Deck (55)
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1

How many nerve pairs are in the lumbars

Five

2

What do the medial and lateral branches of the posterior rami supply

Medial branches = multifidi, lateral branches = erector spinae group

3

What is special about post primary rami

It is strictly motor!

4

The anterior primary rami contribute to what

The lumbar (L1-L4) and sacral (L4 and L5) plexus

5

How many lumbar sympathetic ganglia are there

4

6

How do gray and white communicans communicate with sympathetic trunk

White rami communicans associated with L1,L2, L3 sometimes and gray rami communicans associated with each lumbar nerves

7

What forms the lumbar plexus

L1-L3 and part of L4 as well as receive some contribution from T12 by way of communication of L1 nerve

8

What muscular branches supply the quadratus lumborum, psoas minor, psoas major

L1-L4 supply QL, L1-L2 p. Minor, L3-L4 p.major

9

What fibers are contained in the iliohypogastric nerve

T12 and L1

10

How does the iliohypogastric nerve travel

Anterior and inferior between the QL and kidney. Then through the transverse abdominal muscle and travels between it and the internal abdominal oblique then give off the lateral cutaneous branch

11

What does the lateral cutaneous branch supply

The posterolateral gluteal region

12

What does the lateral cutaneous branch continue as

The anterior cutaneous branch

13

What does the anterior cutaneous branch supply

Supplies the skin of the pubic region

14

What fibers contribute to the ilioinguinal nerve

T12 and L1

15

How does the ilioinguinal nerve travel

Follow path similar to iliohypogastric nerve enters and is transmitted through the inguinal canal. It leaves the canal through superficial inguinal ring and travels with spermatic cord.

16

What does the ilioinguinal nerve supply sensory to where?

Snesory to skin of the upper medial thigh, base of penis, anterior scrotum in men, in females = mons pubis and labium majus

17

What muscles does the ilioinguinal nerve travel to

Internal abdominal oblique and transverse abdominal

18

What fibers are contained in the genitofemoral nerve

L1 and L2

19

The genitofemoral nerve travels through the ______ and divides into ______

Psoas major muscle and divides into genital branch and femoral branch

20

How does the genital branch travel

Enters and travels through the inguinal canal, leaves canal and provides motor supply to cremaster muscle and sensory supply to skin of anterior scrotum, and mons pubis/labium majus in females

21

The femoral branch passes into thigh posterior to inguinal ligament and supplies the skin of where

The upper anterior thigh

22

What is the reflex associated with the genital branch

Cremasteric reflex

23

What fibers are contained in the lateral cutaneous nerve of the thigh

L2 and L3

24

What type of nerve is the lateral cutaneous nerve of the thigh

Purely sensory

25

What does the lateral cutaneous nerve of the thigh supply

Skin of lateral thigh, superior to the knee

26

How dos the lateral cutaneous nerve of the thigh travel

The nerve leaves the abdominal cavity by passing under inguinal ligament. It travels anterior to the sartorius and through the fascia lata to reach the skin

27

What branches are contained in the femoral nerve

L2, L3, L4

28

What is special about the femoral nerve

It is the largest branch of the lumbar plexus

29

How does the femoral nerve travel

Forms posterior to psoas major and emerges latral to psoas and anterior to iliacus passes inferior to inguinal ligament and enters femoral triangle just lateral to femoral artery. Runs inferior and medially through the adductor canal and into leg, medial to knee

30

Where does the femoral nerve give off branches

Only in abdomen and femoral triangle