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MSK > Lower Limb Compartments > Flashcards

Lower Limb Compartments Flashcards

1
Q

What are the 3 compartments of thigh

A

Anterior, medial, posterior

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2
Q

What are the actions of anterior thigh compartment

A

Flexion of thigh
Extension of leg

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3
Q

What 3 muscles are responsible for thigh flexion in anterior thigh compartment

A

Pectineus
Iliopsoas
Sartorius

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4
Q

What muscle is responsible for extension of the leg in anterior thigh compartment

A

Quadriceps femoris

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5
Q

What nerve innervates all (but psoas major) in anterior thigh compartment

A

Femoral nerve (L2, L3, L4)
psoas major = L1, L2, L3

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6
Q

What is the action of medial thigh compartment

A

adduct the thigh

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7
Q

What are the 5 medial thigh compartment muscles causing adduction

A

Adductor Longus
Adductor Brevis
Adductor Magnus
Gracilis
Obturator Externus

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8
Q

What nerve innervates all the medial thigh compartment muscles apart from hamstring part of adductor magnus

A

Obturator nerve (L2, L3, L4)
hamstring part of adductor magnus = tibial nerve (L4-S3)

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9
Q

What is the action of posterior thigh compartment muscles

A

Extensors of thigh
Flexors of leg

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10
Q

What group of muscles are responsible for extension of thigh and flexion of leg (made up of 3 muscles)

A

Hamstring muscles:
- semitendinosus
-semimembranosus
-biceps femoris

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11
Q

What nerve supplies all muscles of posterior thigh compartment except short head of biceps femoris

A

Tibial nerve (L5, S1, S2)
short head biceps femoris = common fibular division of sciatic nerve

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12
Q

What are the 3 compartments of the leg

A

anterior
lateral
posterior

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13
Q

What is the action of muscles in anterior leg compartment

A

Dorsiflexion of ankle
Extensor of toes

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14
Q

What 4 muscles control both dorsiflexion of ankles & extension of toes

A

Extensor hallucis longus
Fibularis tertius
Tibialis anterior
Extensor digitorum

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15
Q

What nerve innervates anterior compartment of leg

A

DEEP fibular nerve
(branch of common fibular nerve)

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16
Q

What is the action of lateral leg compartment

A

Evert foot
Weakly plantarflex ankle

17
Q

What 2 muscles are responsible for everting foot & plantarflexing ankle in lateral leg compartment

A

Fibularis longus
Fibularis Brevis

18
Q

What nerve innervates lateral leg compartment

A

superficial fibular nerve
(branch of common fibular nerve)

19
Q

what are the 2 different groups in posterior compartment of leg

A

Superficial
Deep

20
Q

what is the action of superficial group in posterior compartment of leg

A

Plantarflexion on ankles

21
Q

what are the 2 actions of deep group in posterior compartment of leg

A

Flexion of toes
Plantarflexion of ankles

22
Q

What muscles cause plantarflexion of ankles in superficial group of posterior leg compartment

A

Soleus
Plantaris
Gastrocnemius

23
Q

What muscles cause flexion of toes & plantarflexion of ankles in deep group of posterior leg compartment

A

Flexor hallucis longus
Flexor digitorum longus
Popliteus flexor
Tibialis posterior

24
Q
A

MSK (9 decks)

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