Lumbar Plexus Flashcards Preview

VCU Anatomy Test 2 > Lumbar Plexus > Flashcards

Flashcards in Lumbar Plexus Deck (13):
1

The lumbar plexus is located where?

deep within psoas major on the posterior abdominal wall

2

The lumbar plexus is formed from _____ rami of ____ - ____.

ventral; L1-L4

3

We are responsible for knowing 2 out of 6 branches. What are they?

1. Femoral n.
2. Obturator n.

4

Femoral n. or Obturator n.:
from posterior divisions of L2-L4.

femoral n.

5

Femoral n. or Obturator n.:
enters thigh deep to the inguinal ligament, lateral to femoral sheath, and divides into several branches

femoral n.

6

Femoral n. or Obturator n.:
innervates muscles of anterior compartment of thigh (except tensor fascia lata)

femoral n.

7

Femoral n. or Obturator n.:
1 of the branches supplies cutaneous branches to anterior thigh (name the nerve and the branch too)

femoral n.
(saphenous n.)

8

Femoral n. or Obturator n.:
from anterior divisions of L2-L4

obturator n.

9

Femoral n. or Obturator n.:
enters thigh through a gap in the obturator foramen (the obturator canal)

obturator n.

10

Name the 2 divisions of Obturator n.

1. anterior division
2. posterior division

11

Obturator nerve lies on which m.?

adductor brevis

12

Femoral n. or Obturator n.:
innervates muscles of medial compartment of thigh (except hamstring part of adductor magnus) & provides cutaneous branch to medial thigh

obturator n.

13

4 nerves to know in dissection on anterior thigh

1. femoral n.
2. obturator n.
3. anterior division of obturator n.
4. posterior division of obturator n.