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MSK > Lower Leg Muscles > Flashcards

Lower Leg Muscles Flashcards

0
Q

Muscles of the anterior leg?

A

Tibialis anterior
Extensor digitorum longus
Extensor hallucis longus
Fibularis tertius

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1
Q

Innervation of the anterior compartment of the leg?

A

Deep fibular nerve

L4, L5

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2
Q

Attachments of the tibialis anterior?

A

Lateral condyle and superior lateral surface of tibia and interosseous membrane
Medial cuneiform and base of first metatarsal

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3
Q

Action of the tibialis anterior?

A

Dorsiflexes ankle

Inverts foot

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4
Q

Attachments of the extensor digitorum longus?

A

Lateral condyle of tibia and superior three quarters of medial fibula and interosseous membrane
Middle and distal phalanges of lateral 4 digits

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5
Q

Action of the extensor digitorum longus?

A

Extends lateral four digits

Dorsiflexes ankle

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6
Q

Action of the extensor hallucis longus?

A

Extends great toe

Dorsiflexes ankle

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7
Q

Attachments of the extensor hallucis longus?

A

Anterior surface of fibula and interosseous membrane

Dorsal aspect of base of distal phalanx of great toe (hallux)

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8
Q

Attachments of the fibularis tertius?

A

Inferior third and anterior surface of fibula

Dorsum of base of 5th metatarsal

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9
Q

Action of the fibularis tertius?

A

Dorsi flexes ankle

Everts foot

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10
Q

Muscles of the lateral compartment of the lower leg?

A

Fibularis longus

Fibularis brevis

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11
Q

Attachments of the fibularis longus?

A

Head and superior two thirds of lateral surface of fibula

Base of metatarsal I and medial cuneiform

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12
Q

Action of the fibularis longus?

A

Everts foot weakly and plantarflexes ankle

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13
Q

Innervation of the lateral compartment of the lower leg?

A

Superficial fibular nerve

L5, S1, S2

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14
Q

Attachments of the fibularis brevis?

A

Inferior two thirds of lateral surface of fibula

Tuberosity on lateral side of base of 5th metatarsal

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15
Q

Action of the fibularis brevis?

A

Everts foot

Weakly plantarflexes ankle

16
Q

What does injury to the common fibular nerve result in?

A

Foot drop

17
Q

What are the posterior leg muscles innervated by?

A

Tibial nerve

18
Q

Name the superficial muscles of the posterior compartment of the leg

A

Gastrocnemius
Soleus
Plantaris

19
Q

Name the deep muscles of the posterior leg

A

Popliteus
Flexor hallucis longus
Flexor digitorum longus
Tibialis posterior

20
Q

Attachments of the gastrocnemius?

A

Lateral head: Lateral condyle of femur
Medial head: popliteal surface of femur

Posterior surface of calcaneus via calcaneal tendon

21
Q

Attachment of the soleus muscles?

A

Posterior aspect of head and surface of fibula and soleal line of tibia
Posterior surface of calcaneus via calcaneal tendon

22
Q

Action of ten gastrocnemius?

A

Plantarflexes ankle when knee is extended
Raises heel during walking
Flexes leg at knee joint

23
Q

Action of the soleus?

A

Plantarflexes ankle

Steadies leg in foot

24
Q

Attachments of the plantaris?

A

Lateral supracondylar line of FEMUR

Posterior surface of calcaneus via calcaneal tendon

25
Q

Action of ten plantaris?

A

Weakly assists gastrocnemius in plantarflexing the ankle

26
Q

Attachments of the popliteus?

A

Lateral condyle of femur and lateral meniscus

Posterior surface of tibia

27
Q

Action of the popliteus?

A

Weakly flexes the knee
Unlocks it by rotating femur by 5*
Medially rotates tibia of unplanted limb

28
Q

Attachments of the flexor hallucis longus?

A

Posterior fibula and interosseous membrane

Base of distal phalanx of great toe

29
Q

Actions of the flexor hallucis longus?

A

Flexes the great toe
Weakly plantarflexes the ankle
Supports medial longitudinal arch of the foot

30
Q

Attachments of the flexor digitorum longus?

A

Posterior tibia to bases of distal phalanges of lateral four digits

31
Q

Action of the flexor digitorum longus?

A

Flexes lateral 4 digits
Plantarflexes ankle
Supports longitudinal arch of the foot

32
Q

Attachments of the tibialis posterior?

A

Interosseous membrane, posterior tibia and fibula

Tuberosity of navicular, cuneiform, cuboid and calcaneus and bases of 2nd-4th metatarsals

33
Q

Actions of the tibialis posterior?

A

Plantarflexes the ankle

Inverts the foot

MSK (29 decks)

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