Lab List Thursday 6/19/14

Question 0

Tibialis anterior origins (2)

Answer 0

• lateral condyle of tibia

- INTEROSSEOUS MEMBRANE

Question 1

The muscles of the anterior compartment of the leg share a common origin, nerve, and artery (TA, EHL, EDL, fibularis terius), what are they?

Answer 1

Origin: Interosseous membrane
Nerve: Deep fibular nerve
Artery: anterior tibial artery

Question 2

Tibialis anterior insertions (2)

Answer 2

• medial cuneiform

- base of first metatarsal

Question 3

Anterior tibialis innervation

Answer 3

Deep fibular nerve (L4, L5)

Question 4

Anterior tibialis main actions (3)

Answer 4

• dorsiflexes ankle
• inverts foot
• supports medial longitudinal arch of foot

Question 5

Extensor hallucis longus origins (2)

Answer 5

• middle part of anterior surface of the fibula

- INTEROSSEOUS MEMBRANE

Question 6

Extensor hallucis longus insertion

Answer 6

base of distal phalanx of great toe (dorsal aspect)

Question 7

Extensor hallucis longus, extensor digitorum longus, and fibularis tertius segmental innervation

Answer 7

L5, S1 (deep fibular nerve)

Question 8

Extensor hallucis longus actions (2)

Answer 8

• extends great toe

- dorsiflexes ankle

Question 9

Extensor digitorum longus origins (3)

Answer 9

• lateral condyle of tibia
• superior 2/3 of anterior surface of fibula
• interosseous membrane

Question 10

Extensor digitorum longus insertion

Answer 10

middle and distal phalanges of lateral four digits

Question 11

Extensor digitorum longus actions (2)

Answer 11

• extends lateral four digits

- dorsiflexes ankle

Question 12

Fibularis tertius origins (2)

Answer 12

• inferior third of anterior surface of fibula

- interosseous membrane

Question 13

fibularius tertius insertion

Answer 13

dorsum of base of 5th metatarsal

Question 14

Fibularis tertius actions (2)

Answer 14

• dorsiflexes ankle

- aids in eversion of the foot

Question 15

Fibularis longus origin

Answer 15

head and lateral two thirds of lateral surface of the fibula

Question 16

Fibularis longus insertion (2)

Answer 16

• base of 1st metatarsal

- medial cuneiform

Question 17

Innervation of fibularis longus and fibularis brevis

Answer 17

Superficial fibular nerve (L5, S1, S2)

Question 18

Main actions of fibularis longus and fibularis brevis (3)

Answer 18

• evert foot
• weakly plantarflex ankle
• FL supports transverse arch of foot

Question 19

Fibularis brevis

Answer 19

middle part of lateral surface of fibula

Question 20

Fibularis brevis insertion

Answer 20

base of 5th metatarsal (dorsal surface of tuberosity)

Question 21

The leg is divided into three compartments:

Answer 21

• anterior (dorsiflexors or extensors)
• lateral
• posterior (plantarflexor or flexors)

Question 22

The superior and inferior extensor retinaculum prevent ____ during dorsiflexion of the ankle joint

Answer 22

bow-stringing anteriorly

Question 23

What are the muscles of the anterior compartment of the leg?

Answer 23

• tibialis anterior
• extensor digitorum longus
• extensor hallucis longus
• fibularis tertius

Question 24

The 1 innervates the anterior compartment of the leg and the 2 supplies the anterior compartment of the leg

Answer 24

1) deep fibular nerve

2) anterior tibial artery

Question 25

The anterior tibial artery turns into the the ___ inferiorly

Answer 25

dorsalis pedis artery

Question 26

The superficial fibular nerve continues as a 1, supplying the skin of the distal part of the anterior surface of the leg and almost all the dorsum of the foot

Answer 26

cutaneous nerve

Question 27

The lateral compartment of the leg is the 1 compartment, innervated by the 2 and containing the 3 and 4 muscles

Answer 27

1) “everter”
2) superficial fibular nerve
3) fibularis longus
4) fibularis brevis

Question 28

There is no artery in the lateral compartment of the leg. It is supplied proximally by perforating branches of the 1 and distally by the perforating branches of the 2

Answer 28

1) anterior tibial artery

2) fibular artery