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MSK Week 3 > LM 6.4: Leg > Flashcards

LM 6.4: Leg Flashcards

1
Q

what are the compartments of the leg?

A
  1. anterior
  2. posterior
  3. lateral
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2
Q

which nerves innervate each of the compartments of the leg?

A
  1. anterior =
    deep fibular nerve
  2. posterior = tibial nerve
  3. lateral = superficial fibular nerve
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3
Q

what are the muscles in the anterior compartment of the leg? which nerve are they innervated by?

A
  1. tibialis anterior
  2. extensor digitorum longus
  3. extensor hallucis longus

innervated by deep fibular nerve

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4
Q

what are the muscles in the lateral compartment of the leg? which nerve are they innervated by?

A
  1. fibularis longus
  2. fibularis brevis

innervated by the superficial fibular nerve

evert the ankle

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5
Q

what are the muscles in the superficial posterior compartment of the leg? which nerve are they innervated by?

A
  1. gastrocnemius
  2. soleus
  3. plantaris

innervated by the tibial nerve

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6
Q

what are the muscles in the deep posterior compartment of the leg? which nerve are they innervated by?

A
  1. tibialis posterior
  2. flexor digitorum longus
  3. flexor hallucis longus
  4. popliteus

innervated by the tibial nerve

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7
Q

what is the action and innervation of the tibialis anterior?

A

action = plantar flexes and inverts foot

innervation = deep fibular nerve

located immediately lateral to anterior border of tibia

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8
Q

what is the action, attachment and innervation of the extensor hallucis longus?

A

distal attachment = 1st digit phalanx

action = extends 1st digit; dorsiflexes foot/ankle

innervation = deep fibular nerve

often hidden between tibialis anterior and extensor digitorum longus

“hallucis” means great toe

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9
Q

what is the action, attachment and innervation of the extensor digitorum longus?

A

distal attachment = digits 2-5

action = extends digits 2-5; dorsiflexes foot

innervation = deep fibular nerve

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10
Q

what is the action, attachment and innervation of the fibularis longus?

A

proximal attachment = fibula

distal attachment = base of 1st metatarsal

action = eversion of foot

innervation = superficial fibular nerve

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11
Q

what is the action, attachment and innervation of the fibularis brevis?

A

proximal attachment: fibula

Distal attachment: tuberosity of 5th metatarsal

Action: eversion of foot

Innervation: superficial fibular nerve

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12
Q

what is the action, attachment and innervation of the gastrocnemius?

A

Two heads: medial & lateral

Proximal attachment: femur

Distal attachment: calcaneus

Action: flexes leg/knee; and plantar flexes foot

Innervation: tibial nerve

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13
Q

what is the action, attachment and innervation of the soleus?

A

Proximal attachment: soleal line of tibia; head, neck &; shaft of fibula

it does NOT attach to femur so doesn’t act on knee joint, just the ankle

Distal attachment: calcaneus

Action: plantarflexes foot

Innervation: tibial nerve

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14
Q

what is the action, attachment and innervation of the plantaris?

A

Proximal attachment: femur

Distal attachment: calcaneus

Action: flexes leg/knee; plantar flexes foot

Innervation: tibial nerve

Little helper for lateral head of gastrocnemius

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15
Q

what is the action and innervation of the tibialis posterior

A

Tucked between flexor hallucis longus and flexor digitorum longus muscle

Action: plantarflexes and inverts foot

Innervation: tibial nerve

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16
Q

what is the action, attachment and innervation of the flexor hallucis longus?

A

Distal attachment: 1st digit, aka big toe

Action: flexes big toe; and plantarflexes foot

Innervation: tibial nerve

Muscle belly is most laterally located of posterior deep compartment

17
Q

what is the action, attachment and innervation of the flexor digitorum longus?

A

Distal attachment: digits 2-5

Action: flexes digits 2-5; and plantarflexes foot

Innervation: tibial nerve

Muscle belly is most medially located of posterior deep compartment

18
Q

what is the action and innervation of the popliteus muscle?

A

Action: unlocks knee = medial rotation of tibia

Innervation: tibial nerve

19
Q

which muscles make up the achilles tendon?

A

gastrocnemius, soleus and plantaris

20
Q

what’s the pneumonic for the arrangement of the tendons, arteries and nerve from anterior to posterior?

A

tom, dick and very nervous harry

MSK Week 3 (10 decks)

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