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PHTH 510 > Leg Muscles > Flashcards

Leg Muscles Flashcards

1
Q

what are the posterior superficial leg muscles

A
  1. gastroc
    2.soleus
  2. plantaris
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2
Q

what are the posterior deep leg muscles

A

1.popliteus
2.flexor digitorum longus
3. flexor halluces longus
4. tibialis posterior

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3
Q

what is the major innervation of the posterior compartment of the leg

A

tibial nerve

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4
Q

what are the muscles of the lateral compartment of the leg

A

fibularis longus and fibularis brevis

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5
Q

what is the major innervation of the lateral compartment of the leg

A

superficial fibular nerve

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6
Q

what are the muscles of the anterior leg

A

tibialis anterior, extensor hallucis longus, extensor digitorum longus, and fibularis tertius

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7
Q

what is the major innervation of the anterior leg?

A

deep fibular nerve

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8
Q

what is the origin of the gastroc?

A

upper posterior medial and lateral condyle of the femur

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9
Q

what is the insertion of the gastroc?

A

Calcaneal tendon-calcaneous

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10
Q

what is the action of the gastroc?

A

plantarflexion of the foot and flexion of the knee

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11
Q

what is the origin of the soleus

A

The soleal line and medial border of the tibia. The posterior aspect of the fibular proximal shaft.

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12
Q

what is the insertion of the soleus

A

calcaneal tendon- calcaneus

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13
Q

what is the origin of the plantaris

A

the lateral supracondylar line of the femur (superior to the lateral head of the gastroc)

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14
Q

what is the insertion of plantaris

A

calcaneal tendon- calcaneous

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15
Q

what is the action of the soleus

A

plantar flexion of the foot

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16
Q

What is the action of plantaris

A

plantarflexion of the foot and flexion of the knee

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17
Q

what is the origin of popliteus

A

Lateral surface of femoral condyle

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18
Q

what is the insertion of popliteus

A

Posterior surface of proximal tibia

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19
Q

what is the action of popliteus

A

In a closed chain movement, will laterally rotate the femur
In an open chain movement, will internally rotate tibia

20
Q

what is the origin of flexor digitorum longus

A

The medial side of the posterior surface of the tibia

21
Q

what is the insertion of flexor digitorum longus

A

The distal phalanges of the lateral for toes

22
Q

what is the action of flexor digitorum longus

A

Flexion of the lateral 4 toes

23
Q

what is the origin of flexor halluces longus

A

The inferior 2/3 of the posterior surface of the fibula and interosseous membrane

24
Q

what is the insertion of flexor halluces longus

A

The plantar surface of the distal phalanx of the great toe

25
Q

what is the action of flexor halluces longus

A

Flexion of the great toe, inversion, and plantarflexion

26
Q

what is the origin of tibialis posterior

A

The posterior surface of the interosseous membrane and shafts of the tibia and fibula

27
Q

what is the insertion of tibilis posterior

A

The tuberosity of the navicular and medial cuneiform bone

28
Q

what is the action of tibialis posterior

A

Inversion and plantar flexion of the foot

29
Q

what is the origin of fibularis longus

A

The upper lateral surface and head of fibula and the interosseous membrane

30
Q

what is the insertion of fibularis longus

A

The base of metatarsal I & M and the cuneiforms

31
Q

What is the action of fibularis longus?

A

Eversion and plantar flexion of the foot

32
Q

What action do fibularis longus and fabulous brevis have in common

A

Eversion and plantar flexion of the foot

33
Q

What is the origin of fibularis brevis?

A

The lateral distal surface of shaft, a fibula

34
Q

What is the insertion of fibularis brevis

A

Lateral tubercle at the base of metatarsal V

35
Q

What is the origin of tibialis anterior?

A

The lateral condyle of the tibia

36
Q

What is the insertion of tibialis anterior?

A

The medial cuneiform and base of metatarsal I

37
Q

What is the action of tibialis anterior?

A

Dorsiflexion and inversion of the foot

38
Q

What is the origin of extensor hallucis longus?

A

The medial surface of fibula and interosseous membrane

39
Q

What is the insertion for extensor hallucis longus?

A

The base of the distal phalanx of the great toe

40
Q

What is the action of extensor hallucis longus?

A

Extension of great toe and dorsiflexion of the foot

41
Q

What is the origin of extensor digitorum longus?

A

The medial surface of the fibula, and the lateral tibial condyle

42
Q

What is the insertion of extensor digitorum longus?

A

The distal and middle phalanges of the lateral four toes

43
Q

What is the action of extensor digitorum longus?

A

Extension of four toes and dorsiflexion of the foot

44
Q

What is the origin of fibularis tertius?

A

The distal part of the anterior surface of the fibula

45
Q

What is the insertion of fibularis tertius?

A

The dorsal medial surface of the base of metatarsal V

46
Q

What is the action of fibularis tertius?

A

Dorsiflexion and eversion of the foot

47
Q

What is the nerve that supplies the anterior surface of the leg?

A

The deep fibular nerve

PHTH 510 (7 decks)

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