Leg & Popliteal Region

Question 1

What innervates the extensor digitorum longus?

Answer 1

Deep fibular nerve

Question 2

What is the main action of the extensor digitorum longus?

Answer 2

Extends lateral 4 digits and dorsiflexes foot at ankle

Question 3

What innervates the extensor hallucis longus?

Answer 3

Deep fibular nerve

Question 4

What is the main action of the extensor hallucis longus?

Answer 4

Extends great toe, dorsiflexes foot at ankle

Question 5

What innervates the fibularis peroneus brevis?

Answer 5

Superficial fibular nerve

Question 6

What is the main action of the fibularis peroneus brevis?

Answer 6

Extends foot and weakly plantarflexes foot at ankle

Question 7

What innervates the fibularis peroneus longus?

Answer 7

Superficial fibular nerve

Question 8

What is the main action of the fibularis peroneus longus?

Answer 8

Extends foot and weakly plantarflexes foot at ankle

Question 9

What innervates the fibularis peroneus tertius?

Answer 9

Deep fibular nerve

Question 10

What is the main action of the fibularis peroneus tertius?

Answer 10

Dorsiflexes foot at ankle and aids in eversion of foot

Question 11

What innervates the flexor digitorum longus?

Answer 11

Tibial nerve

Question 12

What is the main action of the flexor digitorum longus?

Answer 12

Flexes lateral four digits and plantarflexes foot at ankle Supports longitudinal arches of foot

Question 13

What innervates the flexor hallucis longus?

Answer 13

Tibial nerve

Question 14

What is the main action of the flexor hallucis Longus?

Answer 14

Flexes all joints of great toe

Weakly plantarflexes foot at ankle

Question 15

What innervates the gastrocnemius?

Answer 15

Tibial nerve

Question 16

What are the main actions of the gastrocnemius?

Answer 16

Plantarflexes foot at ankle joint
Assists in flexion of knee joint
Raises heel during walking

Question 17

What innervates the plantaris?

Answer 17

Tibial Nerve

Question 18

What is the main action of the plantaris?

Answer 18

Weakly assists gastrocnemius

Question 19

What innervates the popliteus?

Answer 19

Tibial nerve (L4-S1)

Question 20

What is the main action of the popliteus?

Answer 20

Weakly flexes knee and unlocks it by rotating femur on fixed tibia

Question 21

What innervates the soleus muscle?

Answer 21

Tibial nerve

Question 22

What is the main action of the soleus muscle?

Answer 22

Plantarflexes foot at ankle and stabilizes leg over foot

Question 23

What innervates the tibialis anterior?

Answer 23

Deep fibular nerve

Question 24

What is the main action of the tibialis anterior?

Answer 24

Dorsiflexes foot at ankle and inverts foot

Question 25

What innervates the tibialis posterior?

Answer 25

Tibial nerve

Question 26

What is the main action of the tibialis posterior?

Answer 26

Plantarflexes foot at ankle and inverts foot

Question 27

Origin of tibialis anterior?

Answer 27

Lateral condyle of tibia and interosseous membrane

Question 28

Insertion of tibialis anterior?

Answer 28

Medial cuneiform and 1st metatarsal

Question 29

Origin of Extensor digitorum longus?

Answer 29

Lateral condyle of tibia,interosseous | membrane, and fibula

Question 30

Insertion of Extensor digitorum longus?

Answer 30

Phalanges of lateral four digits

Question 31

Origin of Extensor hallucis longus?

Answer 31

Fibula and interosseous membrane

Question 32

Insertion of Extensor hallucis longus?

Answer 32

Distal phalanx of great toe

Question 33

Describe the route of the popliteal artery.

Answer 33

The popliteal artery descends down the posterior thigh, giving off genicular branches that supply the knee joint. At the lower border of the popliteus, the popliteal artery terminates by dividing into anterior and posterior tibial arteries. The anterior tibial - dorsalis pedis artery in the foot The posterior tibial - fibular artery

Question 34

Which muscles evert and which invert?

Answer 34

``` · Eversion muscles: pEroneus longus pEroneus brevis pEroneus terius · Inversion muscles: tIbialis anterior tIbialis posterior ```

Question 35

Anterior compartment of leg contents at the ankle from medial malleolus

Answer 35

The Hamptons Are Never Dull Parties ``` Tibialis anterior tendon (extensor) Hallucis longus Artery (anterior tibial) Nerve (deep peroneal) (extensor) Digitorum Peroneus tertius ```

Question 36

Popliteal fossa contents medial to lateral

Answer 36

``` Serve And Volley Next Ball Semimembranosus/Semitendinosus Artery Vein Nerve Biceps femoris ```