Anterior Leg Compartment O&I

Question 1

Tibialis anterior origin

Answer 1

Tibia, interosseus membrane, and fibula

Question 2

tibialis anterior insertion

Answer 2

Base of the 1st metatarsal, medial cuneiform

Question 3

tibialis anterior nerve

Answer 3

deep fibular nerve

Question 4

tibialis anterior action

Answer 4

inversion and dorsiflexion of foot

Question 5

Extensor hallicus longus origin

Answer 5

tibia, interosseus membrane, and fibula

Question 6

extensor hallicus longus insertion

Answer 6

distal phalanx of great toe

Question 7

extensor hallicus longus innervation

Answer 7

deep fibularis nerve

Question 8

extensor hallicus longus action

Answer 8

extension of great toe, inversion of foot, can dorsiflex foot too

Question 9

extensor digitorum longus origin

Answer 9

tibia, interosseus membrane and fibula

Question 10

extensor digitorum longus insertion

Answer 10

extensor expansion of digits 2-5

Question 11

extensor digitorum longus action

Answer 11

extension of digits 2-5, dorsiflexion of foot

Question 12

fibularis Tertius origin

Answer 12

fibula

Question 13

fibularis Tertius insertion

Answer 13

base of 5th metacarpal

Question 14

fibularis Tertius innervation

Answer 14

deep fibular nerve

Question 15

fibularis Tertius action

Answer 15

eversion and dorsiflexion of foot

Question 16

The muscle tendons of the 4 anterior leg compartment muscles ____cross over each other as they pass underneath the extensor retinacula and remain in ____

Answer 16

do not

order

Question 17

Which muscle sometimes has a distinct muscle belly, but often it’s muscle fibers cannot be distinguished from extensor digitorum longus?

Answer 17

fibularis Tertius

Question 18

Unlike the extensor digitorum longus tendons, the fibularis Tertius tendons do not cross the ___,____, and ___ joints

Answer 18

MCP, PIP, DIP

Question 19

What artery and vein supply the anterior compartment of the leg?

Answer 19

anterior tibial artery and vein

Question 20

The dorsum of the foot contains which two muscles?

Answer 20

extensor hallicus brevis

extensor digitorum brevis

Question 21

What innervates the dorsum of the foot?

Answer 21

Deep fibularis nerve

Question 22

extensor digitorum brevis origin

Answer 22

calcaneus

Question 23

extensor digitorum brevis insertion

Answer 23

extensor expansion of digits 2-4

Question 24

extensor hallicus brevis origin

Answer 24

calcaneus

Question 25

extensor hallicus brevis insertion

Answer 25

base of proximal phalanx of digit 1