Anterior and Lateral leg, Dorsal foot

Question 1

Motor innervation of anterior leg

Answer 1

Deep fibular n.

Question 2

Arterial and venous blood supply to anterior leg?

Answer 2

Anterior tibial artery and vein

Question 3

Cutaneous innervation to anterior leg

Answer 3

Saphenous n. (from femoral n.

Question 4

Motor innervation of lateral leg

Answer 4

Superficial fibular n.

Question 5

Arterial and venous blood suppy to latera leg

Answer 5

Posterior tibial and fibular artery and vein

Question 6

Cutaneous innervation to lateral leg

Answer 6

Common fibular n.

Question 7

Origin and insertion of tibialis anterior

Answer 7

O: lateral condyl; lateral surface of tibia and interosseous membrane

I: Medial cuneiform, base of metatarsal 1

Question 8

Innervation and action of tibialis anterior

Answer 8

N: Deep fibular n.

A: Dorsiflexes and inverts the foot

Question 9

What mucsles’s tendon passes anterior to medial malleolus

Answer 9

tibialis anterior

Question 10

Origin and insertion of Extensor Hallucis Longus

Answer 10

O: Anterior fibula and interosseous membrane

I: Base of distal phalanx of hallux (digit 1)

Question 11

Innervation and action of extensor hallucis longus

Answer 11

N: deep fibular n

A: dorsiflexes ankle and extends hallux

Question 12

Origin and insertion of extensor digitorum longus

Answer 12

O: lateral condyle of tibia, proximal 2/3 anterior fibula and interosseous membrane

I: middle and distal phalanges of phalanges 2-5 (extensor expansion)

Question 13

Innervation and action of extensor digitorum longus

Answer 13

N: deep fibular n

A: dorsiflexes foot and extends lateral 4 toes

Question 14

Identify

Answer 14

Extensor expansion

Question 15

What is the origin and insertion of fibularis tertius

Answer 15

O: Inferior 1/3 anterior fibula and interosseous membrane

I: Base of metatarsal 5

*Proximally it is fuse with extensor digitorum longus but seperates distally

Question 16

What tendons from the anterior leg muscles are seen on the foot?

Answer 16

• Most medial: Tibialis anterior
• Extensor hallucis longus
• (4) extendor digitorum longus
• Fibularis tertius

Question 17

Medial to the tendon of extensor hallucis longus, you can palpate the pulse from which artery?

Answer 17

Dorsalis pedis a.

Question 18

What is the origin and insertion of fibularis longus

Answer 18

O: head/superior 2/3 of lateral fibula

I: base of metatarsal 1 and medial cuneiform

Question 19

What is the innervation and action of fibularis longus

Answer 19

N: superficial fibular n.

A: Everts foot

Question 20

What is the origin and insertion of fibularis brevis

Answer 20

O: Inferior 2/3 of lateral fibula

I: tuberosity at base of metatarsal 5

Question 21

What is the innervation and action of fibularlis brevis

Answer 21

N: superficial fibular n

A: everts foot

Question 22

What 3 muscles are responsible for eversion

Answer 22

• Fibularis longus
• Fibularis brevis
• Fibularis tertius

Question 23

What 2 muscles are responsible for inversion of the foot

Answer 23

• tibialis posterior
• tibialis anterior

Question 24

What 2 muscles (one from anterior and one from lateral leg) give support of longitudinal arches

Answer 24

Tibialis anterior

Fibularis longus

Question 25

What muscle of the lateral leg gives support to the transverse arch of the foot

Answer 25

fibularis longus tendon

Question 26

Pes planus

Answer 26

* flatfoot * flexible flatfoot * medial arch absent while weight bearing * inadequate passive arch support

Question 27

Origin and insertion of extensor digitorum brevis

Answer 27

O: dorsal surface of calcaneous I: EDL tendons of toes 2-44

Question 28

Innervation and action of extensor digitorum brevis

Answer 28

I: deep fibular n A: Aids EDL in extending toes 2-5

Question 29

What is the origin and insertion of extensor hallucis brevis

Answer 29

O: dorsal surface of calcaneous I: base of proximal phalanx 1 (hallux)

Question 30

What is the innervation and action of extensor hallucis brevis

Answer 30

N: Deep fibular n A: aids EHL in extending hallux