Peripheral Nerves of the Lumbosacral plexus

Question 1

Femoral

Answer 1

L2-L4
Muscles:
Iliopsoas
Sartorius
Pectineus
Quadriceps femoris

Sensory: Anterior and medial thigh, medial leg, foot

Impairment: weak hip flexion, loss of knee extension.

Question 2

Obturator

Answer 2

L2-L4
Muscles:
Hip adductors
obturator externus

Sensory: middle part of medial thigh.

Impairment:
Loss of hip adduction, weak hip lateral rotation, weak hip extension and adduction

Question 3

Sciatic

Answer 3

L4-S3
Muscles:
hamstrings
adductor magnus

Sensory: none

Impairment: Loss of knee flexion

Question 4

Tibial

Answer 4

L4-S3
Muscles:
Popliteus
Ankle plantar flexors
Tibialis posterior
Flexor digitorum longus
Flexor hallucis longus
Foot intrinsics

Sensory: Posterolateral leg and foot

Impairment: Loss of ankle planter flexion. weak ankle inversion, Loss of toe flexion

Question 5

Common fibular divisions
Superficial (SF
Deep )(DF

Answer 5

L4-S2
Muscles
Fibularis longus and brevis (SF)
Tibialis anterior and toe extensors (DF)

Sensory: Anterior lateral leg and foot
Impairment:
DF - loss of ankle dorsiflexion, loss of toe extension
SF- Loss of ankle eversion.