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Anatomy - HSC501 > Muscles of the Leg > Flashcards

Muscles of the Leg Flashcards

1
Q

Name the Muscles of the Anterior Compartment

Tom’s Harry Dick is the Smallest

A

Tibialis Anterior
Extensor Digitorum Longus
Extensor Hallucis Longus
Fibularis Tertius

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2
Q

Tibialis Anterior - Origin

A

Lateral Condyle and Proximal Lateral surface of the Tibia

Interosseous membrane

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3
Q

Tibialis Anterior - Insertion

A

Medial cuneiform and base of 1st metatarsal

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4
Q

Tibialis Anterior - Innervation

A

DEEP FIBULAR NERVE

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5
Q

Tibialis Anterior - Action(s)

A

Dorsiflex ankle

Invert Foot

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6
Q

Extensor Digitorum Longus - Origin

A

Lateral Condyle of tibia
Proximal fibula
Interosseous membrane

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7
Q

Extensor Digitorum Longus - Insertion

A

Middle and distal phalanges of lateral four digits (digits 2-5)

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8
Q

Extensor Digitorum Longus - Innervation

A

DEEP FIBULAR NERVE

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9
Q

Extensor Digitorum Longus - Action(s)

A

Extends lateral four digits (2-5)

Dorsiflexes ankle

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10
Q

Extensor Hallucis Longus - Origin

A

Anterior surface of fibula

Interosseous membrane

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11
Q

Extensor Hallucis Longus - Insertion

A

Base of distal phalanx of great (big) toe

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12
Q

Extensor Hallucis Longus - Innervation

A

DEEP FIBULAR NERVE

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13
Q

Extensor Hallucis Longus - Action(s)

A

Extends big toe

Dosiflexes ankle

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14
Q

Fibularis Tertius - Origin

A

Anterior, distal fibula

Interosseous membrane

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15
Q

Fibularis Tertius - Insertion

A

Base of 5th metatarsal

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16
Q

Fibularis Tertius - Innervation

A

DEEP FIBULAR NERVE

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17
Q

Fibularis Tertius - Action(s)

A

Dorsiflexes ankle

EXCEPTION Aids in EVERSION of the foot

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18
Q

Name the Muscles of the Lateral compartment of the Leg

A

Fibularis Longus

Fibularis Brevis

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19
Q

Fibularis Longus - Origin

A

Head and proximal, lateral surface of FIBULA

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20
Q

Fibularis Longus - Insertion

A

Base of 1st metatarsal and medial cuneiform (similar to tibialis anterior)

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21
Q

Fibularis Longus - Innervation

A

Superficial Fibular Nerve

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22
Q

Fibularis Longus - Action(s)

A

Everts foot

Weakly Plantarflexes

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23
Q

Fibularis Brevis - Origin

A

Middle, lateral surface of FIBULA

24
Q

Fibularis Brevis - Insertion

A

Base of 5th Metatarsal (similar to fibularis tertium)

25
Q

Fibularis Brevis - Innervation

A

Superficial Fibular Nerve

26
Q

Fibularis Brevis - Action(s)

A

Everts foot

Weakly plantarflexes

27
Q

Name the Muscles of the SUPERFICIAL Posterior Compartment of the Leg

A

Gastrocnemius
Soleus
Plantaris

28
Q

What is the name of the fascia that separates the superficial and deep compartments of the posterior leg?

A

Transverse intermuscular septa

29
Q

Gastrocnemius - Origin

A

LATERAL HEAD - lateral aspect of the lateral femoral condyle

MEDIAL HEAD - popliteal surface of femur superior to medial condyle

30
Q

Gastrocnemius - Insertion

A

Posterior Calcaneus via calcaneal tendon

31
Q

Gastrocnemius - Innervation

A

Tibial Nerve

32
Q

Gastrocnemius - Action(s)

A

Plantarflexes ankle when knee is extended
Raises heel when walking
Flexes leg at knee joint EXCEPTION

33
Q

Soleus - Origin

A

Posterior head of fibula

Soleal line of tibia

34
Q

Soleus - Insertion

A

Posterior calcaneus via calcaneal tendon

35
Q

Soleus - Innervation

A

Tibial Nerve

36
Q

Soleus - Action(s)

A

Plantarflexes ankle

37
Q

Plantaris - Origin

A

Lateral supracondylar line of femur

38
Q

Plantaris - Insertion

A

Posterior calcaneus via calcaneal tendon

39
Q

Plantaris - Innervation

A

Tibial Nerve

40
Q

Plantaris - Action(s)

A

Weakly assists gastrocnemius in plantarflexing ankle

41
Q

Name the Muscles of the DEEP Posterior Compartment of the Leg

A

Popliteus
Tibialis Posterior
Flexor Digitorum Longus
Flexor Hallucis Longus

42
Q

Popliteus - Origin

A

Lateral femoral condyle

Lateral Meniscus

43
Q

Popliteus - Insertion

A

Posterior tibia superior to soleal line

44
Q

Popliteus - Innervation

A

Tibial Nerve

45
Q

Popliteus - Action(s)

A

Laterally rotates femur on fixed tibia
OR
Medially rotates tibia of unfixed limb

The unlocking muscle of the knee

46
Q

Tibialis Posterior - Origin

A

Posterior tibia, fibula and interosseous membrane

47
Q

Tibialis Posterior - Insertion

A

Primarily to tuberosity of navicular

48
Q

Tibialis Posterior - Innervation

A

Tibial Nerve

49
Q

Tibialis Posterior - Action(s)

A

Inverts foot

Plantarflexes ankle

50
Q

Flexor Digitorum Longus - Origin

A

Posterior tibia and fibula

51
Q

Flexor Digitorum Longus - Insertion

A

Bases of distal phalanges of lateral four digits

52
Q

Flexor Digitorum Longus - Innervation

A

Tibial Nerve

53
Q

Flexor Digitorum Longus - Action(s)

A

Flexes lateral four digits

Plantarflexes ankle

54
Q

Flexor Hallucis Longus - Origin

A

Inferior, posterior fibula and interosseous membrane

55
Q

Flexor Hallucis Longus - Insertion

A

Base of distal phalanyx of great toe

56
Q

Flexor Hallucis Longus - Innervation

A

Tibial nerve

57
Q

Flexor Hallucis Longus - Action(s)

A

Flexes great toe

Weakly Plantarflexes ankle

Anatomy - HSC501 (18 decks)

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