Lower Limb Compartments Flashcards
What are the 3 compartments of thigh
Anterior, medial, posterior
What are the actions of anterior thigh compartment
Flexion of thigh
Extension of leg
What 3 muscles are responsible for thigh flexion in anterior thigh compartment
Pectineus
Iliopsoas
Sartorius
What muscle is responsible for extension of the leg in anterior thigh compartment
Quadriceps femoris
What nerve innervates all (but psoas major) in anterior thigh compartment
Femoral nerve (L2, L3, L4)
psoas major = L1, L2, L3
What is the action of medial thigh compartment
adduct the thigh
What are the 5 medial thigh compartment muscles causing adduction
Adductor Longus
Adductor Brevis
Adductor Magnus
Gracilis
Obturator Externus
What nerve innervates all the medial thigh compartment muscles apart from hamstring part of adductor magnus
Obturator nerve (L2, L3, L4)
hamstring part of adductor magnus = tibial nerve (L4-S3)
What is the action of posterior thigh compartment muscles
Extensors of thigh
Flexors of leg
What group of muscles are responsible for extension of thigh and flexion of leg (made up of 3 muscles)
Hamstring muscles:
- semitendinosus
-semimembranosus
-biceps femoris
What nerve supplies all muscles of posterior thigh compartment except short head of biceps femoris
Tibial nerve (L5, S1, S2)
short head biceps femoris = common fibular division of sciatic nerve
What are the 3 compartments of the leg
anterior
lateral
posterior
What is the action of muscles in anterior leg compartment
Dorsiflexion of ankle
Extensor of toes
What 4 muscles control both dorsiflexion of ankles & extension of toes
Extensor hallucis longus
Fibularis tertius
Tibialis anterior
Extensor digitorum
What nerve innervates anterior compartment of leg
DEEP fibular nerve
(branch of common fibular nerve)
What is the action of lateral leg compartment
Evert foot
Weakly plantarflex ankle
What 2 muscles are responsible for everting foot & plantarflexing ankle in lateral leg compartment
Fibularis longus
Fibularis Brevis
What nerve innervates lateral leg compartment
superficial fibular nerve
(branch of common fibular nerve)
what are the 2 different groups in posterior compartment of leg
Superficial
Deep
what is the action of superficial group in posterior compartment of leg
Plantarflexion on ankles
what are the 2 actions of deep group in posterior compartment of leg
Flexion of toes
Plantarflexion of ankles
What muscles cause plantarflexion of ankles in superficial group of posterior leg compartment
Soleus
Plantaris
Gastrocnemius
What muscles cause flexion of toes & plantarflexion of ankles in deep group of posterior leg compartment
Flexor hallucis longus
Flexor digitorum longus
Popliteus flexor
Tibialis posterior
