Muscles Of The Leg

Question 1

What do the muscles of the anterior leg do?

Answer 1

They act to dorsiflex and invert the foot

Question 2

What are the muscles of the anterior leg supplied by?

Answer 2

Innervated by the deep fibular nerve (L4-L5)

Question 3

Name the muscles of the anterior leg?

Answer 3

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

Question 4

What supplies the blood to the anterior leg?

Answer 4

The anterior tibial artery

Question 5

What is the origin and insertion of the tibials anterior?

Answer 5

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

Question 6

What does the tibilas anterior do?

Answer 6

It dorsiflexes and inverts the foot

Question 7

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

Answer 7

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

Question 8

What are the actions of the extesnor digitrum longus?

Answer 8

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

Question 9

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

Answer 9

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

Question 10

What is the action of the extensor hallicus longus?

Answer 10

Extension of the great toe and dorsiflexion of the foot

Question 11

What is the origin and insertion of the fibularis tetris?

Answer 11

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

Question 12

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

Answer 12

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

Question 13

Name the muscles in the lateral comparment of the leg:

Answer 13

The fibularis longus and brevis

Question 14

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

Answer 14

Eversion and prevention of excessive invversion of the legs

Question 15

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

Answer 15

The superficial compartment of the leg, L4-S1

Question 16

What is the origin and insertion of the fibularis longus?

Answer 16

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

Question 17

What is the action of the fibularis longus?

Answer 17

Eversion and plantarflexion of the foot

Question 18

What is the origin and insertion of the fibularis brevis?

Answer 18

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

Question 19

Name the superficial muscles of the posterior leg.

Answer 19

Gastrocneisu, plantaris and soleus

Question 20

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

Answer 20

They act to plantarflex and invert the foot

Question 21

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

Answer 21

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

Question 22

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

Answer 22

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

Question 23

Where do the superfical muscles of the posterior leg insert?

Answer 23

The cacenal tendon.

Question 24

What is the origin of the gastrocnemius muscle?

Answer 24

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

Question 25

What is the action of the gastrocnemius?

Answer 25

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

Question 26

Where does the plantaris orignate?

Answer 26

The lateral suprcondylar line of the femur

Question 27

What is the origin and insertion of the soleus?

Answer 27

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

Question 28

When is a ruptured cacleneal tendon more likely?

Answer 28

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

Question 29

What are the muscles in the deep posterior leg?

Answer 29

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

Question 30

What is the origin and insertion of the popliteus muscle?

Answer 30

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

Question 31

What is the origin and insertion of the tibialus posterior?

Answer 31

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

Question 32

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

Answer 32

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

Question 33

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

Answer 33

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