Leg (Anterior)

Question 1

The anterior and lateral compartment of leg are supplied by?

Answer 1

Common peroneal nerve
Anterior - Deep peroneal nerve
Posterior - Superficial peroneal nerve

Question 2

Sciatic nerve splits into what branches at popliteal fossa?

Answer 2

1.Tibial branch - posterior compartment
2.Common peroneal/fibular - lateral and anterior compartment

Question 3

Name muscles of anterior compartment of leg?

Answer 3

1. Tibialis anterior
2. Extensor Digitorum longus
3. Extensor Hallucis longus
4. Peroneus (fibularis) tertius

Question 4

Common action of muscles of anterior compartment of leg?

Answer 4

1. Dorsiflex
2. Inversion of foot (except peroneous tertius - everts)
3. Extend the toes (extensor digitorum longus and extensor hallucis longus
4. Support to arch of foot (tibialis anterior)

Question 5

Most superficial muscle of muscles of anterior compartment of leg?

Answer 5

Tibialis anterior

Question 6

Origin and insertion of tibialis anterior?

Answer 6

origin
Shaft of tibia and interosseous membrane

Insertion
Medial cuneiform and base of 1st metatarsal bone

Question 7

Origin and insertion of extensor hallucis longus?

Answer 7

origin
Medial surface of Shaft of fibula and interosseous membrane

Insertion
Base of distal phalanx of big toe

Question 8

Action of extensor hallucis longus?

Answer 8

Extends the big toe

Question 9

Extensor digitorum longus is ______ to extensor hallucis longus?

Answer 9

Superficial

Question 10

Origin and insertion of extensor digitorum longus?

Answer 10

origin
Medial surface of shaft of fibula (superior to extensor hallucis longus)
And lateral condyle of tibia
And the interosseous membrane

Insertion
Extensor expansion of lateral 4 toes (2-5)

Question 11

Origin and insertion of peroneus tertius?

Answer 11

origin
Medial surface of shaft of fibula (distally)

Insertion
Base of 5th metatarsal bone

Question 12

Common origin of muscles of anterior compartment of leg? And the one muscle which shows exception?

Answer 12

shaft of fibula and interosseous membrane
1. Extensor digitorum longus
2. Peroneus tertius
3. Extensor hallucis longus

Shaft of tibia and interosseous membrane
4. Tibialis anterior

Question 13

The common fibular nerve winds around _____?

Answer 13

Neck of fibula

Question 14

Fracture to the neck of fibula causes? And what nerve is damaged?

Answer 14

Foot drop
Unable to dorsiflex the foot

Common peroneal nerve is damaged

Question 15

1._____ nerve is damaged in foot drop And in foot drop ____ is fractured

2. and ____ nerve is damged in wrist drop? And in wrist drop ____ is fractured?

Answer 15

1. Common peroneal (fibular) nerve
   - neck of fibula
2. Radial nerve
   - mid shaft of humerus

Question 16

The muscle that is thought to arise from most distal part of extensor digitorum longus?

Answer 16

fibularis (peroneus) tertius

Question 17

Action of peroneus tertius?

Answer 17

Eversion and dorsiflexion of foot