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S1 Anatomy > Leg Muscles > Flashcards

Leg Muscles Flashcards

(59 cards)

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1
Q

muscles of anterior compartment of leg

A

tibialis anterior
extensor hallucis longus
entensor digitorum ongus
peroneus tertius

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2
Q

tibialis anterior

-origin

A

lateral condyle of tibia

superior 1/2 of lateral tibia

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3
Q

tibialis anterior

-insertion

A

medial and inferior surface of

  • medial cuneiform
  • 1st metatarsal
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4
Q

tibialis anterior

-actions

A

foot dorsiflexion
foot inversion
supports the medial longitudinal arch

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5
Q

tibialis anterior

-innervation

A

deep fibular nerve (L4, L5)

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6
Q

extensor hallucis longus

-origin

A

middle part of anterior surface of fibula

interosseus membrane

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7
Q

extensor hallucis longus

-insertion

A

dorsal aspect of base of distal phalanx of hallux

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8
Q

extensor hallucis longus

-actions

A

hallux extension

foot dorsiflexion

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9
Q

extensor hallucis longus

-innervation

A

deep fibular (L4, L5)

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10
Q

entensor digitorum longus

-origin

A

lateral condyle of tibia
superior 3/4 of anterior surface of fibula
interosseus membrane

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11
Q

entensor digitorum longus

-insertion

A

middle and distal phalanges of lateral 4 digits

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12
Q

entensor digitorum longus

-actions

A

extends lateral 4 digits

dorsiflexes foot

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13
Q

entensor digitorum longus

-innervation

A

deep fibular (L4, L5)

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14
Q

peroneus (fibular) tertius

-origin

A

inferior 1/3 of anterior surface of fibula

interosseus membrane

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15
Q

peroneus (fibular) tertius

-insertion

A

dorsum of base of 5th metatarsal

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16
Q

peroneus (fibular) tertius

-actions

A

foot dorsiflexion

aids in foot eversion

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17
Q

peroneus (fibular) tertius

-innervation

A

deep fibular (L4, L5)

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18
Q

muscle of lateral compartment of leg

A

peroneus longus

peroneus brevis

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19
Q

peroneus (fibular) longus

-origin

A

head and superior 2/3 of lateral surface of fibula

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20
Q

peroneus (fibular) longus

-insertion

A

base of first metatarsal

medial cuneiform

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21
Q

peroneus (fibular) longus

-actions

A 
foot eversion
weak foot plantarflexion
tendon supports
-transverse arch
-medial longitudinal arch
-lateral longitudinal arch
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22
Q

peroneus (fibular) longus

-innervation

A

superficial fibular (L5, S1, S2)

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23
Q

peroneus brevis

-origin

A

inferior 2/3 of lateral surface of fibula

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24
Q

peroneus brevis

-insertion

Study These Flashcards
A

dorsal surface of tuberosity on lateral side of base of 5th metatarsal

25
peroneus brevis | -actions
foot eversion | weak plantarflexion
26
peroneus brevis | -innervation
superficial fibular nerve (L5, S1, S2)
27
muscles of the superficial posterior compartment of the leg
gastrocnemius soleus plantaris
28
gastrocnemius | -origin
lateral head -lateral aspect of lateral condyle of femur medial head -popliteal surface of femur, superior to medial condyle
29
gastrocnemius | -insertion
posterior surface of calcaneus via tendo calcaneus
30
gastrocnemius | -actions
plantar flexes foot raises heel during walking flexes knee
31
gastrocnemius | -innervation
tibial nerve (S1, S2)
32
soleus | -origin
posterior aspect of head of fibula superior 1/4 of fibula soleal line medial border of tibia
33
soleus | -insertion
posterior surface of calcaneus via tendo calcaneus
34
soleus | -actions
plantar flexes foot | raises heel during walking
35
soleus | -innervation
tibial nerve (S1, S2)
36
plantaris | -origin
inferior end of lateral supracondylar line of femur | oblique popliteal ligament
37
plantaris | -insertion
fuses with tendo calcaneus
38
plantaris | -action
weakly assists in plantarflexion and flexion of knee
39
plantaris | -innervation
tibial nerve (S1, S2)
40
muscles of the deep posterior compartment of the leg
popliteus flexor hallucis longus flexor digitorum longus tibialis posterior
41
popliteus | -origin
lateral surface of lateral condyle of femur and lateral meniscus
42
popliteus | -insertion
posterior surface of tibia superior to soleal line
43
popliteus | -actions
weakly flexes knee unlocks knee -rotates femur laterally on fixed tibia -rotates tibia medially on fixed femur
44
popliteus | -innervation
tibial nerve (L4, L5, S1)
45
flexor hallucis longus | -origin
inferior 2/3 of posterior surface of fibula | inferior part of interosseus membrane
46
flexor hallucis longus | -insertion
base of distal phalanx of hallux
47
flexor hallucis longus | -action
flexes hallux at all joints plantar flexes foot supports longitudinal arch of foot
48
flexor hallucis longus | -innervation
tibial nerve (S2, S3)
49
flexor digitorum longus | -origin
medial part of posterior surface of tibia inferior to soleal line to fibula via broad aponeurosis
50
flexor digitorum longus | -insertion
bases of distal phalanges of lateral 4 digits
51
flexor digitorum longus | -actions
flexes lateral 4 digits plantarflexes foot suports medial longitudinal arch of foot
52
flexor digitorum longus | -innervation
tibial nerve (S2, S3)
53
tibialis posterior | -origin
interosseus membrane posterior surface o tibia inferior to soleal line posterior surface of fibula
54
tibialis posterior | -insertion
tuberosity of navicular all three cuneiform bones (and cuboid bone?) bases of 2nd, 3rd, 4th metatarsals
55
tibialis posterior | -actions
``` plantarflexes foot inverts foot supports -transverse arch -medial longitudinal arch ```
56
tibialis posterior | -innervation
tibial nerve (L4, L5)
57
muscles that support medial longitudinal arch
``` tibialis anterior peroneus longus flexor hallucis longus flexor digitorum longus tibialis posterior ```
58
muscles that support lateral longitudinal arch
peroneus longus | flexor hallucis longus?
59
muscles that support transverse longitudinal arch
peroneus longus | tibialis posterior

S1 Anatomy (31 decks)

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