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AAA MSK anatomy > lower leg - insertion, action, innervation > Flashcards

lower leg - insertion, action, innervation Flashcards

1
Q

Tibialis anterior - proximal origin

A

Superior lateral tibia, interosseus membrane

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2
Q

Tibialis anterior - distal insertion

A

medial cuneiform, 1st metatarsal

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3
Q

Tibialis anterior - action

A

Dorsiflexion

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4
Q

Tibialis anterior - innervation

A

Deep fibular nerve
(L4, L5)

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5
Q

Extensor hallucis longus - proximal origin

A

Mid. Anterior Fibula, interosseus membrane

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6
Q

Extensor hallucis longus - distal insertion

A

distal phalanx of hallucis (dorsal)

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7
Q

Extensor hallucis longus - action

A
  • Dorsiflexion
  • Toe extension
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8
Q

Extensor hallucis longus - innervation

A

Deep fibular nerve

(L5, S1)

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9
Q

Extensor digitorum longus - proximal origin

A

Lateral tibia, anterior Fibula, interosseus membrane

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10
Q

Extensor digitorum longus - distal insertion

A

middle and distal phalanges of lateral digits

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11
Q

Extensor digitorum longus - action

A
  • Dorsiflexion
  • Toe extension
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12
Q

Extensor digitorum longus - innervation

A

Deep fibular nerve

(L5, S1)

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13
Q

Fibularis tertius - proximal origin

A

Inferior Anterior Fibula, interosseus membrane

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14
Q

Fibularis tertius - distal insertion

A

base of 5th metatarsal (dorsal)

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15
Q

Fibularis tertius - action

A
  • Dorsiflexion
  • Toe extension
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16
Q

Fibularis tertius - innervation

A

Deep fibular nerve

(L5, S1)

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17
Q

Fibularis longus - proximal origin

A

Superior Lateral fibula

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18
Q

Fibularis longus - distal insertion

A

base 1st metatarsal, medial cuneiform

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19
Q

Fibularis longus - action

A
  • Foot eversion
  • Weak plantarflexion
  • supports transverse arch of foot
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20
Q

Fibularis longus - innervation

A

Superficial fibular nerve (L5, S1, S2)

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21
Q

Fibularis brevis - proximal origin

A

Mid. Lateral fibula

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22
Q

Fibularis brevis - distal insertion

A

base of 5th tuberosity (dorsal)

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23
Q

Fibularis brevis - action

A
  • Foot eversion
  • Weak plantarflexion
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24
Q

Fibularis brevis - innervation

A

Superficial fibular nerve (L5, S1, S2)

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25
Q

Gastrocnemius - proximal origin

A

LH: lat. condyle of femur
MH: popliteal surface of femur

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26
Q

Gastrocnemius - distal insertion

A

LH: calcaneus (calcaneal tendon)
MH: calcaneus (calcaneal tendon)

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27
Q

Gastrocnemius - action

A
  • Plantarflexion when knee extended
  • Knee flexion
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28
Q

Gastrocnemius - innervation

A

Tibial nerve (S1, S2)

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29
Q

Soleus - proximal origin

A

Post. head of fibula

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30
Q

Soleus - distal insertion

A

calcaneus (calcaneal tendon)

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31
Q

Soleus - action

A

plantarflexion

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32
Q

Soleus - innervation

A

Tibial nerve (S1, S2)

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33
Q

Plantaris - proximal origin

A

Supracondylar line of femur

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34
Q

Plantaris - distal insertion

A

calcaneus (calcaneal tendon)

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35
Q

Plantaris - action

A

Assists plantarflexion

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36
Q

Plantaris - innervation

A

Tibial nerve (S1, S2)

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37
Q

Popliteus - proximal origin

A

Lateral condyle of femur

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38
Q

Popliteus - distal insertion

A

posterior tibia

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39
Q

Popliteus - action

A
  • Flexes knee
  • Medial rotation of tibia?
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40
Q

Popliteus - innervation

A

Tibial nerve (L4, L5, S1)

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41
Q

Flexor hallucis longus - proximal origin

A

Posterior fibula

42
Q

Flexor hallucis longus - distal insertion

A

base of distal phalanx of great toe

43
Q

Flexor hallucis longus - action

A
  • Big toe flexion
  • Plantarflexion
  • Supports arch of foot
44
Q

Flexor hallucis longus - innervation

A

Tibial nerve (S2, S3)

45
Q

Flexor digitorum longus - proximal origin

A

Medial Posterior tibia

46
Q

Flexor digitorum longus - distal insertion

A

base of distal phalanges of lateral digits

47
Q

Flexor digitorum longus - action

A
  • Toe flexion
  • Plantarflexion
  • Supports arch of foot
48
Q

Flexor digitorum longus - innervation

A

Tibial nerve (S2, S3)

49
Q

Tibialis posterior - proximal origin

A

Interosseus membrane

50
Q

Tibialis posterior - distal insertion

A

navicular tuberosity, cuneiforms, cuboid, base of 2nd-4th metatarsals

51
Q

Tibialis posterior - action

A
  • Plantarflexion
  • Inversion
  • Supports arch of foot
52
Q

Tibialis posterior - innervation

A

Tibial nerve (L4, L5)

53
Q

Extensor hallucis brevis - proximal origin

54
Q

Extensor hallucis brevis - distal insertion

A

proximal phalanx of big toe

55
Q

Extensor hallucis brevis - action

A

Extend great toe

56
Q

Extensor hallucis brevis - innervation

A

Deep fibular nerve

(L5, S1)

57
Q

Extensor digitorum brevis - proximal origin

58
Q

Extensor digitorum brevis - distal insertion

A

proximal phalanges 2-4 digits

59
Q

Extensor digitorum brevis - action

A

Extend lateral digits

60
Q

Extensor digitorum brevis - innervation

A

Deep fibular nerve

(L5, S1)

61
Q

Abductor hallucis - proximal origin

A

Tuberosity of calcaneus

62
Q

Abductor hallucis - distal insertion

A

base of proximal phalanx

63
Q

Abductor hallucis - action

A

Abducts and flexes great toe

64
Q

Abductor hallucis - innervation

A

Medial plantar nerve
(S2, S3)

65
Q

Flexor digitorum brevis - proximal origin

A

Tuberosity of calcaneus

66
Q

Flexor digitorum brevis - distal insertion

A

middle phalanges of lat. four digits

67
Q

Flexor digitorum brevis - action

A

Flexes lateral digits

68
Q

Flexor digitorum brevis - innervation

A

Medial plantar nerve
(S2, S3)

69
Q

Abductor digiti minimi - proximal origin

A

Tuberosity of calcaneus

70
Q

Abductor digiti minimi - distal insertion

A

base of proximal phalanx of 5th digit

71
Q

Abductor digiti minimi - action

A

Abducts and flexes 5th digit

72
Q

Abductor digiti minimi - innervation

A

Lateral plantar nerve
(S2, S3)

73
Q

Quadratus Plantae - proximal origin

A

Medial surface of plantar calcaneus

74
Q

Quadratus Plantae - distal insertion

A

flexor digitorum longus tendon

75
Q

Quadratus Plantae - action

A

Assists flexor digitorum longus -> flex lateral four digits

76
Q

Quadratus Plantae - innervation

A

Lateral plantar nerve
(S2, S3)

77
Q

Lumbricals - proximal origin

A

Flexor digitorum longus tendon

78
Q

Lumbricals - distal insertion

A

medial aspect of expansion over lateral four digits

79
Q

Lumbricals - action

A

Flex proximal phalanges, extend middle and distal phalanges of lateral four digits

80
Q

Lumbricals - innervation

A

Medial one: medial plantar nerve (S2, S3)

Lateral three: lateral plantar nerve (S2, S3)

81
Q

Flexor hallucis brevis - proximal origin

A

Plantar surface of cuboid and cuneiform

82
Q

Flexor hallucis brevis - distal insertion

A

base of proximal phalanx of 1st digit

83
Q

Flexor hallucis brevis - action

A

Flexes proximal phalanx of great toe

84
Q

Flexor hallucis brevis - innervation

A

Medial plantar nerve
(S2, S3)

85
Q

Adductor hallucis - proximal origin

A

OH: base of metatarsals

TH: plantar 3-5 MTPJ

86
Q

Adductor hallucis - distal insertion

A

OH: base of proximal phalanx of 1st digit

TH: base of proximal phalanx of 1st digit

87
Q

Adductor hallucis - action

A

Adducts great toe

88
Q

Adductor hallucis - innervation

A

Deep branch of lateral plantar nerve
(S2, S3)

89
Q

Flexor digiti minimi brevis - proximal origin

A

Base of 5th metatarsal

90
Q

Flexor digiti minimi brevis - distal insertion

A

base of proximal phalanges of 3-5 digits

91
Q

Flexor digiti minimi brevis - action

A

Flexes proximal phalanx of 5th digit

92
Q

Flexor digiti minimi brevis - innervation

A

Superficial branch of lateral planter nerve (S2, S3)

93
Q

Plantar interossei - proximal origin

A

Base/ medial 3-5 metatarsals

94
Q

Plantar interossei - distal insertion

A

medial sides of base of 3-5 proximal phalanges

95
Q

Plantar interossei - action

A

Adducts digits 3-5 and flexes MTP joints

(PAD)

96
Q

Plantar interossei - innervation

A

Lateral planter nerve
(S2, S3)

97
Q

Dorsal interossei - proximal origin

A

Sides 1-5 metatarsals

98
Q

Dorsal interossei - distal insertion

A

1st: medial proximal phalanx 2nd digit,

2nd – 4th : lateral 2-4 digits

99
Q

Dorsal interossei - action

A

Abducts digits (2-4) and flexes MTP joints

(DAB)

100
Q

Dorsal interossei - innervation

A

Lateral planter nerve
(S2, S3)

AAA MSK anatomy (8 decks)

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