Anterior Leg

Question 1

What region is behind the knee?

Answer 1

popliteal fossa

Question 2

Where does the TIbial Nerve enter the leg?

Answer 2

posterior compartment of the leg

Question 3

What passes through the popliteal fossa?

Answer 3

Popliteal artery, popliteal vein, tibial nerve, common fibular nerve

Question 4

Common fibular nerve

Answer 4

passes laterally around the neck of the fibula, divides into the superficial fibular nerve ( biggest in the body?) and deep fibular nerve

Question 5

What does the superficial fibular nerve supply?

Answer 5

the lateral compartment of the leg

Question 6

What does the deep fibular nerve supply?

Answer 6

anterior compartment of the leg

Question 7

What is the deep fascia of the leg called?

Answer 7

Crural fascia, which attatches to the tibia to divide the leg into compartments

Question 8

What are the muscles of the anterior leg ?

Answer 8

Tibialis anterior, Extensor digitorum longus, Extensor hallucis longus, Fibularis (peroneus) tertius

Question 9

What are the muscles of the lateral leg?

Answer 9

Fibularis longus and fibularis brevis

Question 10

What may stretch the tendons of the lateral leg?

Answer 10

strong inversion of the foot

Question 11

Which tendon is known for its strength?

Answer 11

tendon of fibularis brevis

Question 12

What may cause foot drop ?

Answer 12

Damage to the common fibular nerve, this nerve is at risk when the proximal fibula is fractured

Question 13

What is foot drop?

Answer 13

Inability to dorsiflex the foot and extend toes, resulting in dragging the toes and foot when walking. Compensation with a high stepping gait

Question 14

What is compartment syndrome?

Answer 14

Condition where increased pressure within a muscle compartment can lead to nerve and muscle damage. The crural fascia is very strong . fasciotomy may be required

Question 15

What is the origin, insertion, innervation, and action of the tibialis anterior ?

Answer 15

origin: lateral condyle and superior half of lateral surface of tibia
Insertion: medial and inferior surface of medial cuneiform and base of 1st metatarsal
Innervation:deep fibular nerve
action:dorsiflexes ankle, inverts foot, supports arch

Question 16

What is the origin, insertion, innervation, and action of the extensor hallucis longus ?

Answer 16

origin:Middle part of anterior surface of fibula and interosseus membrane
Insertion: dorsal aspect of base of distal phalanx of great toe
Innervation: deep fibular nerve
action: extends great toe, dorsiflexes ankle

Question 17

What is the origin, insertion, innervation, and action of the extensor digitorum longus ?

Answer 17

origin:lateral condyle of tibia and superior three fourths of anterior surface of interosseus membrane
Insertion:middle and distal phalanges of the lateral four digits
Innervation: deep fibular nerve
action: extends lateral four digits, dorsiflexes ankle

Question 18

What is the origin, insertion, innervation, and action of the Fibularis longus?

Answer 18

origin:head and superior two thirds of lateral surface of fibula
Insertion: base of 1st metatarsal and medial cuneiform
Innervation: Superficial fibular nerve
action: evert foot ; weakly plantar flexes foot

Question 19

What is the origin, insertion, innervation, and action of the Fibularis brevis?

Answer 19

origin:inferior two thirds of lateral surface of fibula
Insertion:dorsal surface of tuberosity of base of 5th metatarsal
Innervation: Superficial fibular nerve
action: ??