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-Anatomy of Lower Limb and Spine > Posterior comp of leg > Flashcards

Posterior comp of leg Flashcards

1
Q

What are the muscles in the superficial layer of the posterior compartment of the leg? what is their innervation?
And what is their common function?

A

Gastronemius
Soleus
Plantaris

Innervation = Tibial Nerve (S1, S2)
common function = plantar flexion

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2
Q

what are the deep muscles of the posterior compartment of the leg?

What is their innervation?

A

Popliteus
Flexor Digitorum Longus
Flexor Hallucis longus
Tibialis Posterior

Innervation = Tibial nerve

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3
Q

What is the origin of Gastronemius?

A

Medial head = Posterior surface of the distal Femur

Lateral head = Upper Posterolateral surface of LATERAL FEMORAL CONDYLE

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4
Q

What is the insertion of Gastrocnemius?

A

Via CALCANEAL TENDON to posterior surface of calcaneus.

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5
Q

What is the innervation of Gastrocnemius?

A

Tibial nerve

S1, S2

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6
Q

What is the action of gastrocnemius?

A

Plantar flexion of foot

Flexes knee

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7
Q

What is the origin of Plantaris?

A

Inferior part of the LATERAL SUPERCONDYLAR LINE of FEMUR.

Oblique popliteal ligament of knee

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8
Q

What is the insertion of Plantaris?

A

Via CALCANEAL TENDON to posterior surface of Calcaneus.

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9
Q

What is the innervation of Plantaris?

A

Tibial Nerve

S1, S2

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10
Q

what is the action of plantaris?

A

Plantar flexes foot

Flexes knee

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11
Q

What is the origin of Soleus?

A 
Soleal line (on tibia)
Medial border of TIBIA
Posterior aspect of FIBULAR HEAD.
Adjacent surfaces of neck of fibular
Proximal shaft of FIBULA
Tendinous between tibial and fibular attachments
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12
Q

What is the insertion of Soleus?

A

Via Calcaneal tendon to posterior surface of calcaneus

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13
Q

What is the innervation of Soleus?

A

Tibial Nerve

S1, S2

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14
Q

What is the action of Soleus?

A

Plantar-Flexes the foot

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15
Q

What is the origin of popliteus?

A

Lateral Femoral Condyle

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16
Q

What is the insertion of popliteus?

A

Posterior surface of proximal tibia

17
Q

What is the innervation of popliteus?

A

Tibial nerve

L4, L5, S1

18
Q

what is the action of popliteus?

A

Stabilizes knee joint by resisting lateral rotation of tibia on femur.

UNLOCKS knee joint by laterally rotating femur on fixed tibia.

19
Q

What is the origin of Flexor Digitorum Longus?

A

Medial surface of TIBIA

20
Q

What is the insertion of Flexor digitorum longus?

A

Plantar surface of bases of distasl phalanges of the lateral 4 toes

21
Q

What is the innervation of Flexor digitorum longus?

A

Tibial Nerve

S2, S3

22
Q

What is the action of the Flexor Digitorum Longus?

A

Flexes the lateral 4 toes

23
Q

What is the origin of Flexor hallucis longus?

A

Posterior surface of the fibula

and ajacent interosseous membrane

24
Q

What is the insertion of Flexor hallucis longus?

A

Plantar surface of the distal phalanx of the great toe

25
Q

what is the innervation of flexor hallucis longus?

A

Tibial nerve (S2, S3)

26
Q

what is the action of flexor hallucis longus?

A

flexes great toe

27
Q

What is the origin of tibialis posterior?

A

Interosseous membrane between tibia and fibula
and
posterior surface of tibia and fibula

28
Q

What is the insertion of tibialis posterior?

A

Plantar surface of medial tarsal bones

29
Q

What is the innervation of tibialis posterior?

A

Tibial Nerve

30
Q

What is the action of tibialis posterior?

A

Inverts foot.

Plantarflexion

-Anatomy of Lower Limb and Spine (15 decks)

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