Muscles of the Leg

Question 1

Tibialis Anterior

Answer 1

O: Lateral condyle and proximal 2/3 of the lateral surface of tibia and interosseous membrane

I: Medial cuneiform and the base of
the first metatarsal

A: Dorsiflexion, inversion

I: Deep peroneal n.

Question 2

Extensor Digitorum
Longus

Answer 2

O: Lateral condyle of tibia and
medial surface of fibula

I: By four tendons that attach to the
proximal base middle and distal
phalanges via the dorsal digital
expansion

A: Toe extension, Ankle dorsiflexion,
eversion

I: Deep peroneal n.

Question 3

Extensor Hallucis
Longus

Answer 3

O: Medial surface of the fibula
and adjacent interosseous
membrane

I: Distal phalanx of great toe

A: 1st toe extension, Ankle dorsiflexion,
inversion

I: Deep peroneal n.

Question 4

Peroneus Tertius

Answer 4

O: Distal one third of the medial surface of the fibula and adjacent interosseous membrane

I: Base of 5th metatarsal

A: Ankle dorsiflexion, eversion

I: Deep peroneal n.

Question 5

Peroneus Longus

Answer 5

O: Lateral condyle of tibia; head, proximal two thirds of the lateral surface of the fibula

I: Lateral surface of the medial
cuneiform and lateral side of the
base of first metatarsal bone

A: Plantarflexion, eversion

I: Superficial peroneal

Question 6

Peroneus Brevis

Answer 6

O: Peroneus Brevis

I: Styloid process of the fifth metatarsal

A: Plantarflexion, eversion

I: Superficial peroneal n.

Question 7

Gastrocnemius

Answer 7

O: Posterior aspect of the lateral and medial femoral condyle

I: Calcaneal tuberosity via the Achilles
tendon

A: Plantar flexion, Knee flexion

I: Tibial n.

Question 8

Soleus

Answer 8

O: Posterior surface of the fibula head and proximal 1/3 of its shaft and from the posterior side of the tibia

I: Calcaneal tuberosity via the Achilles
tendon

A: Plantar flexion

I: Tibial n.

Question 9

Plantaris

Answer 9

O: Inferior part of lateral supracondylar line of the femur

I: Joins the medial aspect of the
Achilles tendon to insert on the
calcaneal tuberosity

A: Slight Knee flexion, Plantarflexion

I: Tibial n.

Question 10

Popliteus

Answer 10

O: Lateral condyle of femur

I: Posterior side of tibia

A: Knee flexion and internal rotation

I: Tibial n.

Question 11

Flexor Digitorum Longus

Answer 11

O: Posterior surface of tibia

I: By four separate tendons to the
base of the distal phalanx of the four
lesser toes

A: 2-5 toes flexion, Plantar flexion,
Inversion

I: Tibial n.

Question 12

Flexor Hallucis Longus

Answer 12

O: Posterior surface of fibula

I: Plantar surface of the base of the
distal phalanx of the great toe

A: Flexion of great toe, Plantarflexion,
Inversion

I: Tibial n.

Question 13

Tibialis Posterior

Answer 13

O: Posterior surface of the tibia
and fibula & adjacent interosseous membrane

I: Tuberosity of navicular and all tarsals except talus

A: Plantarflexion, Inversion

I: Tibial n.