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Gross > Leg Muscles > Flashcards

Leg Muscles Flashcards

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

A

Middle part of lateral surface of fibula

23
Q

Fibularis brevis insertion

A

Dorsal surface of tuberosity of base of 5th metatarsal

24
Q

Fibularis brevis action

A

Evert foot

Weakly plantar flex ankle

25
Q

Gastrocnemius origin

A

Lateral head: lateral aspect of lateral condyle of femur

Medial head: popliteal surface of femur, superior to medial condyle

26
Q

Gastrocnemius insertion

A

Posterior surface of calcaneus via calcaneal tendon

27
Q

Gastrocnemius innervation

A

Tibial nerve s1, s2

28
Q

Gastrocnemius action

A

Plantar flexes ankle when knee is extended
Raises heel during walking
Flexes knee joint

29
Q

Soleus origin

A

Posterior aspect of head of fibula
Superior quarter of posterior surface of fibula
Soleal line
Medial border of tibia

30
Q

Soleus insertion

A

Posterior surface of calcaneus via calcaneal tendon

31
Q

Soleus innervation

A

Tibial nerve s1, s2

32
Q

Soleus action

A

Plantar flexes ankle, steadies leg on foot

33
Q

Superficial muscle group

A

Gastrocnemius, Soleus, plantaris

34
Q

Plantaris origin

A

Inferior end of lateral supracondylar line of femur and oblique popliteal ligament

35
Q

Plantaris insertion

A

Posterior surface of calcaneus via calcaneal tendon

36
Q

Plantaris innervation

A

Tibial nerve s1, s2

37
Q

Plantaris action

A

Weakly assists gastrocnemius in plantar flexing ankle

Function is probably mainly proprioceptors

38
Q

Deep muscles of posterior compartment of leg

A

Popliteus
Flexor hallucis longus
Flexor digitorum longus
Tibialis posterior

39
Q

Popliteus origin

A

Lateral surface of lateral condyle of femur and lateral meniscus (intra-articular, within cavity of knee joint)

40
Q

Popliteus insertion

A

Posterior surface of tibia, superior to soleal line

41
Q

Popliteus innervation

A

Tibial nerve l4, l5, s1

42
Q

Popliteus action

A

Weakly flexes knee and unlocks it by laterally rotating femur on fixed tibia
May also medially rotate tibia of unplanted limb

43
Q

Flexor hallucis longus origin

A

Inferior two thirds of posterior surface of fibula and inferior part of interosseus membrane

44
Q

Flexor hallucis longus insertion

A

Base of distal phalanx of great toe

45
Q

Flexor hallucis longus innervation

A

Tibial nerve s2, s3

46
Q

Flexor hallucis longus action

A

Flexes great toe at all joints, weakly plantar flexes ankle, supports medial longitudinal arches of foot

47
Q

Flexor digitorum longus origin

A

Medial part of posterior surface of tibia inferior to soleal line and by a broad tendon to fibula

48
Q

Flexor digitorum longus insertion

A

Bases of distal phalanges of lateral four digits

49
Q

Flexor digitorum longus innervation

A

Tibial nerve s2, s3

50
Q

Flexor digitorum longus action

A

Flexes lateral four digits, plantar flexes ankle, supports longitudinal arches of foot

51
Q

Tibialis posterior origin

A

Interosseus membrane, posterior surface of tibia inferior to soleal line and posterior surface of fibula

52
Q

Tibialis posterior insertion

A

Primarily to tuberosity of navicular

Also to cuneiforms, cuboid, and bases of 2nd to 4th metatarsals

53
Q

Tibialis posterior innervation

A

Tibial nerve l4, l5

54
Q

Tibialis posterior action

A

Plantar flexes ankle, inverts foot, supports media, longitudinal arch of foot

Gross (31 decks)

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