Muscles Of The Leg Flashcards

1
Q

What do the muscles of the anterior leg do?

A

They act to dorsiflex and invert the foot

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2
Q

What are the muscles of the anterior leg supplied by?

A

Innervated by the deep fibular nerve (L4-L5)

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3
Q

Name the muscles of the anterior leg?

A

The tibalis anterior, the extensor digitorum longus, and the extesnor hallicus longus, and the fibularis tetris

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4
Q

What supplies the blood to the anterior leg?

A

The anterior tibial artery

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5
Q

What is the origin and insertion of the tibials anterior?

A

Originates from lateral surface of the tibia, attaches to the medial cuneiform, and base of the foot.

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6
Q

What does the tibilas anterior do?

A

It dorsiflexes and inverts the foot

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7
Q

What is the origin and insertion of the extensor digitorum longus?

A

Originates from the lateral condyle of the tibia and the medial surface of the fibula.

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8
Q

What are the actions of the extesnor digitrum longus?

A

Extension of the lateral four toes, and dorsiflexion of the foot

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9
Q

What is the origin and insertion of the extensor hallicus longus?

A

Orignates from the medial surface of the fibular shaft, tendon crosses anterior to the ankle joint and attaches to the distal phalynx of the great toe

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10
Q

What is the action of the extensor hallicus longus?

A

Extension of the great toe and dorsiflexion of the foot

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11
Q

What is the origin and insertion of the fibularis tetris?

A

Arises from the most inferior part of the EDL, from the medial surface of the fibular, diverted and attaches to metatarsal V.

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12
Q

What causes footdrop and what are some of the clinical features?

A

Most commonly seen in damage to the common fibular nerve, and you see unopposed plantarflexion and therefore you see an eversion flick while walking

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13
Q

Name the muscles in the lateral comparment of the leg:

A

The fibularis longus and brevis

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14
Q

What are the actions of muscles in the lateral compartment of the leg?

A

Eversion and prevention of excessive invversion of the legs

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15
Q

What is the innervation of muscles in the lteral compartment of the leg?

A

The superficial compartment of the leg, L4-S1

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16
Q

What is the origin and insertion of the fibularis longus?

A

Originates from the superior and later surface of the fibula and the lateral tibial condyle

17
Q

What is the action of the fibularis longus?

A

Eversion and plantarflexion of the foot

18
Q

What is the origin and insertion of the fibularis brevis?

A

Originates from the inferior and lateral surface of the fibular tenon, passes posterior to the lateral malleuous and attaches to a tubercle on metatarsal V

19
Q

Name the superficial muscles of the posterior leg.

A

Gastrocneisu, plantaris and soleus

20
Q

What do the muscles in the posterior compartment of the leg do?

A

They act to plantarflex and invert the foot

21
Q

What nerve innervates the muscles in the posterior compartment of the leg?

A

The tibial nerve, which is a branch of the sciatic nerve

22
Q

What are the two bursa that are assoicated with the calceal tendon?

A

Subcutaneous calcenal bursa, and the deep bursa of the calcenael tendon

23
Q

Where do the superfical muscles of the posterior leg insert?

A

The cacenal tendon.

24
Q

What is the origin of the gastrocnemius muscle?

A

Lateral head orignates from the lateral condyle of the femur, and the medial head from the medial condyle

25
Q

What is the action of the gastrocnemius?

A

Plantar flexes and flexes at the knee, as it crosses both joints

26
Q

Where does the plantaris orignate?

A

The lateral suprcondylar line of the femur

27
Q

What is the origin and insertion of the soleus?

A

Soleal line of the tibia and the proximal fibular area, inserts into the calcenael tendon like everything else

28
Q

When is a ruptured cacleneal tendon more likely?

A

It occurs in people with calcneal tendonitis, and is a injury that is usually sustained during forceful plantar flexion

29
Q

What are the muscles in the deep posterior leg?

A

The popliteus, the tibialus posterior and the flexor digitrum longus, and the felxor hallicus longus

30
Q

What is the origin and insertion of the popliteus muscle?

A

Posterior surface of the proximal teibua, and the attach to the condyle of the femur

31
Q

What is the origin and insertion of the tibialus posterior?

A

Originates from the interosseous membrane, between the tibia and fibula and inserts into the posterior surfaces of the two bones.

32
Q

What is the origin and insertion of the flexor digitorum longus?

A

Orignates from the medial surface of the tibia, and attaches to the plantar surface of the lateral 4 digits

33
Q

What is the origin and insertion of the flexor hallicus longus?

A

Originates from the posterior surface of the fibula, and attaches to the plantar side of the planynx of the great toe