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Leg Muscles Flashcards

(55 cards)

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0
Q

Muscles of lateral compartment of leg

A

Fibularis longus and brevis

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1
Q

Muscles of anterior compartment of leg

A

Tibialis anterior
Extensor hallucinations longus
Extensor digitorum longus
Fibularis tertius

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2
Q

Tibialis anterior origin

A

Lateral condyle and superior 2/3 of lateral surface of tibia and interosseus membrane

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3
Q

Tibialis anterior insertion

A

Medial and inferior surfaces of medial cuneiform and base of 1st metatarsal

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4
Q

Tibialis anterior innervation

A

Deep fibular nerve

L4, L5

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5
Q

Tibialis anterior action

A

Dorsiflexed ankle
Inverts foot
Supports medial longitudinal arch of foot

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6
Q

Extensor hallucis longus origin

A

Middle part of anterior surface of fibula and interosseus membrane

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7
Q

Extensor hallucis longus insertion

A

Dorsal aspect of base of distal phalanx of great toe

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8
Q

Extensor hallucis longus innervation

A

Deep fibular nerve

L5, s1

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9
Q

Extensor hallucis longus action

A

Extends great toe

Dorsiflexes ankle

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10
Q

Extensor digitorum longus origin

A

Lateral condyle of tibia and superior 2/3 of anterior surface of fibula and interosseus membrane

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11
Q

Extensor digitorum longus insertion

A

Middle and distal phalanges of lateral four digits

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12
Q

Extensor digitorum longus innervation

A

Deep fibular nerve

L5, s1

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13
Q

Extensor digitorum longus action

A

Extends lateral four digits

Dorsiflexes ankle

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14
Q

Fibularis tertius origin

A

Inferior third of anterior surface of fibula and interosseus membrane

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15
Q

Fibularis tertius insertion

A

Dorsum of base of 5th metatarsal

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16
Q

Fibularis tertius innervation

A

Deep fibular nerve

L5, s1

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17
Q

Fibularis tertius action

A

Dorsiflexes ankle, aids in eversion of foot

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18
Q

Fibularis longus origin

A

Head and superior two thirds of lateral surface of fibula

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19
Q

Fibularis longus insertion

A

Base of 1st metatarsal and medial cuneiform

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20
Q

Fibularis longus innervation

A

Superficial fibular never

L5, s1, s2

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21
Q

Fibularis longus action

A

Evert foot
Weakly plantar flex ankle
Supports transverse arch of foot

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22
Q

Fibularis brevis origin

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A

Middle part of lateral surface of fibula

23
Q

Fibularis brevis insertion

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A

Dorsal surface of tuberosity of base of 5th metatarsal

24
Fibularis brevis action
Evert foot | Weakly plantar flex ankle
25
Gastrocnemius origin
Lateral head: lateral aspect of lateral condyle of femur | Medial head: popliteal surface of femur, superior to medial condyle
26
Gastrocnemius insertion
Posterior surface of calcaneus via calcaneal tendon
27
Gastrocnemius innervation
Tibial nerve s1, s2
28
Gastrocnemius action
Plantar flexes ankle when knee is extended Raises heel during walking Flexes knee joint
29
Soleus origin
Posterior aspect of head of fibula Superior quarter of posterior surface of fibula Soleal line Medial border of tibia
30
Soleus insertion
Posterior surface of calcaneus via calcaneal tendon
31
Soleus innervation
Tibial nerve s1, s2
32
Soleus action
Plantar flexes ankle, steadies leg on foot
33
Superficial muscle group
Gastrocnemius, Soleus, plantaris
34
Plantaris origin
Inferior end of lateral supracondylar line of femur and oblique popliteal ligament
35
Plantaris insertion
Posterior surface of calcaneus via calcaneal tendon
36
Plantaris innervation
Tibial nerve s1, s2
37
Plantaris action
Weakly assists gastrocnemius in plantar flexing ankle | Function is probably mainly proprioceptors
38
Deep muscles of posterior compartment of leg
Popliteus Flexor hallucis longus Flexor digitorum longus Tibialis posterior
39
Popliteus origin
Lateral surface of lateral condyle of femur and lateral meniscus (intra-articular, within cavity of knee joint)
40
Popliteus insertion
Posterior surface of tibia, superior to soleal line
41
Popliteus innervation
Tibial nerve l4, l5, s1
42
Popliteus action
Weakly flexes knee and unlocks it by laterally rotating femur on fixed tibia May also medially rotate tibia of unplanted limb
43
Flexor hallucis longus origin
Inferior two thirds of posterior surface of fibula and inferior part of interosseus membrane
44
Flexor hallucis longus insertion
Base of distal phalanx of great toe
45
Flexor hallucis longus innervation
Tibial nerve s2, s3
46
Flexor hallucis longus action
Flexes great toe at all joints, weakly plantar flexes ankle, supports medial longitudinal arches of foot
47
Flexor digitorum longus origin
Medial part of posterior surface of tibia inferior to soleal line and by a broad tendon to fibula
48
Flexor digitorum longus insertion
Bases of distal phalanges of lateral four digits
49
Flexor digitorum longus innervation
Tibial nerve s2, s3
50
Flexor digitorum longus action
Flexes lateral four digits, plantar flexes ankle, supports longitudinal arches of foot
51
Tibialis posterior origin
Interosseus membrane, posterior surface of tibia inferior to soleal line and posterior surface of fibula
52
Tibialis posterior insertion
Primarily to tuberosity of navicular | Also to cuneiforms, cuboid, and bases of 2nd to 4th metatarsals
53
Tibialis posterior innervation
Tibial nerve l4, l5
54
Tibialis posterior action
Plantar flexes ankle, inverts foot, supports media, longitudinal arch of foot

Gross (31 decks)

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