neurology of lower limb Flashcards
What is the dermatome of L1?
groin
What is the dermatome of L2?
mid thigh
What is the dermatome of L3?
knee
What is the dermatome of L4?
medial leg
What is the dermatome of L5?
lateral leg and middle toe
What is the dermatome of S1?
lateral foot (test small toe)
What is the dermatome of S2?
back of leg
What is the dermatome of S3?
gluteal region
What are the the cutaneous nerves in the gluteal region?
cluneal nerves
What are the the cutaneous nerves in the posterior thigh?
perforating and posterior femoral cutaneous nerves
What are the the cutaneous nerves in the groin?
subcostal, gentiofemoral and ilioinguinal nerves
What are the the cutaneous nerves in the lateral thigh?
lateral femoral cutaneous nerve
What are the the cutaneous nerves in the anterior thigh ?
anterior cutaneous nerver of the thigh and saphenous nerve
What are the the cutaneous nerves in the inner thigh?
obturator nerve
What are the the cutaneous nerves in the anterior and lateral leg?
common peroneal and lateral sural cutaneous nerves
What are the the cutaneous nerves in the leg and dorsum of foot?
superficial peroneal nerve
What are the the cutaneous nerves in the lateral leg and heel?
sural nerve
What are the myotomes of the hip?
flexion = L2, L3 extension = L4, L5
What are the myotomes of the knee?
extension = L3, L4 flexion = L5, S1
What are the myotomes of the ankle?
extension = L4, L5 flexion = S1, S2
What are the roots of the lumbar plexus?
anterior rami of L1-L4
Why do you get referred pain in the knee and hip?
they have shared innervation
What makes up the lumbar plexus?
- iliohypogastric
- ilioinguinal
- gentiofemoral
- lateral cutaneous nerve of the thigh
- obturator
- femoral
What are the roots of the sacral plexus?
L4-S4
What are the nerves of the sacral plexus?
- superior gluteal
- inferior gluteal
- sciatic
- posterior femoral cutaneous
- pudendal