The Leg

Question 1

Genicular anastomosis

Answer 1

A network of vessels surrounding the knee that are capable of maintaining circulation to the leg in full knee flexion

Question 2

Anterior compartment of the leg

Answer 2

Tibialis anterior
Extensor digitorum longus
extensoru hallucis longus
Peroneus tertius

Dorsiflex and invert the food at the ankle

Innervated by the deep peroneal nerve

Question 3

Tibialis anterior

Answer 3

O: Lateral condyle of the tibia; Lateral aspect of the tibia; Interosseus membrane of the leg

I: Base of the first metatarsal; Medial cuneiform

A: Dorsiflexes the foot at the ankle; Inverts the foot at the ankle

Question 4

Extensor Digitorum Longus

Answer 4

O: Lateral condyle of the tibia; Medial aspect of the tibia; Interosseus membrane of the leg

I: Middle and distal phalanges of the lateral four digits

A: Dorsiflexes the foot at the ankle; Extends the lateral four digits

Question 5

Extensor hallucis longus

Answer 5

O: Medial aspect of the fibula; Interosseus membrane of the leg

I: Base of the first distal phalanx

A: Dorsiflex the food at the ankle; Extends the big toe

Question 6

Lateral compartment of the leg

Answer 6

Peroneus longus and peroneus brevis

Evert the foot

Innervated by the superficial peroneal nerve

Question 7

Fibuaris (peroneus) longus

Answer 7

O: Head of the fibula; Lateral surface of the fibula

I: Base of the first metatarsal; Medial cuneiform bone

A: Everts the foot; (Weakly) Plantarflexes the foot at the ankle

Question 8

Fibularis (peroneus) brevis

Answer 8

O: Lateral fibula

I: Base of the fifth metatarsal

A: Exerts the foot at the ankle;(Weakly) plantar flexes the foot at the ankle

Question 9

(Superficial) Posterior compartment of the leg

Answer 9

Gastrocnemius
Soleus
Plantaris

Plantar flexion of the foot

Innervated by the tibial nerve

Question 10

Gastrocnemius

Answer 10

O: Lateral epicondyles of the femur; Medial epicondyle of the femur

I: Tuber calcanei (via the calcaneal tendon)

A: Plantar flexes the foot at the ankle (leg extended); Flexes the leg at the knee

Question 11

Soleus

Answer 11

O: Posterior fibula; Soleal line of the tibia

I: Tuber calcanei ( vis the calcaneal tendon)

A: Plantar flexes the foot at the ankle (independent of leg extension); High percentage of slow-twitch fibres

Question 12

Plantaris

Answer 12

O: Lateral supracondylar line of the femur

I: Tuber calcanei (via the calcaneal tendon)

A: Plantar flexes the foot at the ankle (weakly)

Question 13

(Deep) Posterir compartment of the leg

Answer 13

Popliteus
Flexor Hallucis Longus
Flexor Digitorum Longus
Tibialis Posterior

Plantar flexion of the foot

Innervated by the Tibial nerve

Question 14

Popliteus

Answer 14

O: Lateral femoral epicondyle

I: Posterior tibia

A: Flexes the leg at the knee; internally rotates the leg at the knee

Question 15

Flexor Hallucis Longus

Answer 15

O: Posterior fibula; Interosseus membrane

I: Base of the first distal phalanx

A: Flexes the big toe; Weakly plantar flexes the foot at the ankle

Question 16

Flexor digitorum Longus

Answer 16

O: Posterior tibia (body)

I: Base of the distal phalanges of toes (2-5)

A: Flexes the toes; Plantar flexes the foot at the ankle; inverts the foot at the ankle

Question 17

Tibialis Posterior

Answer 17

O: Posterior fibula; Posterior tibia; Interosseus membrane

I: Lateral cuneiform bone; Intermediate cuneiform bone; Medial cuneiform bone; Tuberosity of the navicular bone

A: Plantar flexes the foot at the ankle; Inverts the foot at the ankle; Major role in supporting the medial arch