Compartments of Leg

Question 1

The interosseus membrane contains two aperatures. What are they called, what do they convey, and where are they?

Answer 1

Aperature for anterior tibial vessels (carries anterior tibial vessels and is at superior end of interosseus membrane). Aperature for perforating branch of fibular artery (carries vessel of that name, is at inferior end of interosseus membrane)

Question 2

Two branches of the popliteal artery

Answer 2

Anterior tibial and posterior tibial

Question 3

Where does the posterior tibial artery run?

Answer 3

Between the superficial and deep muscles

Question 4

Where do muscles in the lateral compartment of the leg get blood from?

Answer 4

Perforating branches off the fibular artery

Question 5

What does the anterior tibial artery feed?

Answer 5

The anterior compartment of the leg

Question 6

Where does the anterior tibial artery descend through the leg?

Answer 6

On the anterior surface of the interosseus membrane

Question 7

What descends through the leg with the anterior tibial artery and where do they descend?

Answer 7

The deep fibular nerve. They descend on the anterior surface of the interosseus membrane

Question 8

Where does the anterior tibial artery cross the ankle and what is it called after this point?

Answer 8

Midway between lateral and medial malleoulus. It becomes the dorsalis pedis artery at this point

Question 9

What does the posterior tibial artery supply?

Answer 9

Posterior and lateral compartments of the leg, and the foot

Question 10

The tarsal tunnel runs directly behind what structure?

Answer 10

The medial malleolus

Question 11

What supplies the muscles of the posterior compartment of the leg?

Answer 11

The tibial nerve

Question 12

What does the tibial nerve supply and what nerve is this a branch of?

Answer 12

Supplies all muscles in posterior compartment of leg, is a branch of sciatic nerve

Question 13

What structures does the common fibular nerve supply?

Answer 13

Muscles of the anterior and lateral compartments of leg

Question 14

What supplies the muscles of the anterior and lateral compartments of the leg?

Answer 14

The common fibular nerve

Question 15

What are the superficial muscles supplied by the tibial nerve?

Answer 15

Gastrocnemius, plantaris, soleus

Question 16

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

Answer 16

Deep fibular nerve (from the common fibular nerve)

Question 17

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

Answer 17

Tibialis anterior, extensor digitorum longus, extensor hallucis longus, fibularis tertius

Question 18

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

Answer 18

Fibularus longus, fibularis brevis

Question 19

What innervates the muscles of the lateral compartment of the leg?

Answer 19

Superficial fibular nerve (from common fibular nerve)

Question 20

What are the branches of the common fibular nerve?

Answer 20

Deep fibular nerve, superficial fibular nerve

Question 21

What is turning the ankle inward called?

Answer 21

Inversion

Question 22

What is turning the ankle outward called?

Answer 22

Eversion

Question 23

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

Answer 23

Dorsiflexors of the foot and toes

Question 24

What do muscles of the lateral compartment of the leg do?

Answer 24

Elevators of the foot (e.g. eversion)

Question 25

What do muscles of the posterior compartment of the leg do?

Answer 25

Plantar flexors of foot and toes

Question 26

The fibularis longus helps support what structure?

Answer 26

The lateral arch of the foot

Question 27

What injury might cause a muscle of the lateral leg to come off its attachment site, and which muscle?

Answer 27

Inversion ankle sprains can cause fibularis brevis to come off its attachment site (tubercle of 5th metatarsal)

Question 28

Where is fibularis brevis relative to fibularis longus?

Answer 28

Anterior

Question 29

Where does the superior fibular retinaculum run from and to?

Answer 29

Lateral malleolus to calcaneus

Question 30

Activities involving lateral leg muscles

Answer 30

Ankle eversion, ankle stabilization

Question 31

Activities involving anterior leg muscles

Answer 31

Ankle dorsiflexion, walking, resisted movement

Question 32

What type of injury is a shin splint?

Answer 32

Strain of tibialis anterior

Question 33

Where are the popliteal vessels (including nerve) relative to the popliteus muscle?

Answer 33

Posterior to the muscle

Question 34

Order of the structures of the deep posterior leg from medial to lateral

Answer 34

Flexor digitorum longus, tibialis posterior, flexor hallucis longus

Question 35

What are the types of muscle contractions and briefly describe each in terms of the barbell example

Answer 35

Concentric (lift a barbell), eccenteric (slowly lower a barbell), isometric (hold a barbell steady)

Question 36

Two phases of gait

Answer 36

Stance phase (reference foot on ground, 60 percent of time), swing phase (reference foot off ground, 40 percent of time)