B6.032 Prework 3: Lumbosacral plexus and peripheral nerves Flashcards Preview

MM Test 1 > B6.032 Prework 3: Lumbosacral plexus and peripheral nerves > Flashcards

Flashcards in B6.032 Prework 3: Lumbosacral plexus and peripheral nerves Deck (24):
1

lumbar plexus roots

L2-L4

2

major branches off of lumbar plexus

lateral femoral cutaneous
femoral
obturator

3

innervation of lumbar plexus

motor and sensory contributions to the anterior and medial compartments of the leg

4

sacral plexus roots

L4-S4

5

major branches off of sacral plexus

superior gluteal
inferior gluteal
sciatic (peroneal + tibial)
Pudendal

6

superior gluteal nerve

gluteal minimus, medius muscles
hip adductor

7

inferior gluteal nerve

gluteal maximum
hip extendor

8

innervation of sacral plexus

motor and sensory contributions to gluteal and parts of pelvic region, posterior thigh, most of lower leg, and entire foot

9

sciatic nerve roots

L4-S3
longest and largest in the body

10

clinical implication of sciatic nerve

tight piriformis muscle can cause compression of sciatic nerve and give posterior leg symptoms of pain and paresthesia
mimics symptoms of sacral nerve root compression

11

innervation of sciatic nerve

semitendinosis
semimembranosus
biceps femoris
adductor magnus

12

branches of sciatic nerve

tibial nerve
common peroneal nerve

13

innervation of tibial nerve

gastrocnemius
plantaris soleus
popliteus
tibialis posterior
flexor digitorum longus
flexor hallucis longus
*ankle and toe flexion*

14

innervation of sural nerve

sensation to posterior lateral aspect of the lower 1/3 leg and lateral foot

15

medial and lateral plantar nerve

motor and sensory innervation to the plantar foot

16

what is the peroneal nerve

common fibular nerve
travels to upper lateral portion of the lower leg and wraps around the fibular head

17

clinical implication of peroneal nerve

common peroneal neuropathy > foot drop

18

innervation of peroneal nerve

ankle dorsiflexion
toe extension

19

innervation of superficial peroneal nerve

peroneus longus and brevis
sensory distribution to anterior lateral lower leg and dorsum of foot

20

innervation of deep peroneal nerve

innervates tibialis anterior, ext dig longus, peroneus tertius

21

clinical implication of gluteal innervation

superior gluteal nerve injury leads to opposite pelvis drop
Trendelenburg gait

22

lateral femoral cutaneous neuropathy

from wearing heavy tool belts and compressing lateral inguinal area
sensory loss to lateral thigh

23

saphenous nerve entrapment

from medial knee surgery/injury
pain medial distal knee

24

sural nerve entrapment

recurrent ankle problems
pain posterior lateral lower 1/3 leg or lateral foot