Week 9 Anterior and lateral leg

Question 1

joint classification of proximal (superior) tibiofibular joint

Answer 1

plane synovial joint, non weight bearing

Question 2

fibrous capsule of proximal (superior) tibiofibular joint

Answer 2

tendon of popliteus (popliteus bursa) sits posteriorly

Question 3

ligaments of proximal (superior) tibiofibular joint

Answer 3

• anterior ligament of head of fibula
• posterior ligament of head of fibula

Question 4

movement of proximal (superior) tibiofibular joint

Answer 4

slight movement occurs during plantarflexion and dorsiflexion of the ankle

Question 5

joint classification of distal (inferior) tibiofibular joint

Answer 5

compound fibrous joint (syndesmosis)

Question 6

bone and articular surfaces of distal (inferior) tibiofibular joint

Answer 6

• medial surface distal fibula
• fibular notch of distal tibia

Question 7

ligaments of distal (inferior) tibiofibular joint

Answer 7

• interosseous membrane –> increase area of muscle attachment
• interosseous ligament
• anterior and posteiror tibiofibular
• transverse (inferior) tibiofibular

Question 8

movement of distal (inferior) tibiofibular joint

Answer 8

slight movement (during plantarflexion/ dorsiflexion of the ankle)

Question 9

differences between proximal and distal tibiofibular joint

Answer 9

proximal tibiofibular joint:
- plane synovial joint
- have fibrous capsule

distal tibiofibular joint:
- compound fibrous joint (syndesmosis)
- habe interosseous membrane
- no joint cavity

Question 10

what are the four muscles of anterior compartment of the leg

Answer 10

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

Question 11

proximal attachment of tibialis anterior

Answer 11

• interosseous membrane
• lateral condyle and superior half of lateral surface of tibia

Question 12

distal attachment of tibialis anterior

Answer 12

• base of 1st metatarsal
• medial and inferior surfaces of medial cuneiform

Question 13

innervation of tibialis anterior

Answer 13

deep fibular nerve

Question 14

main action of tibialis anterior

Answer 14

• dorsiflexes ankle joint
• inverts subtalar joint

Question 15

proximal attachment of extensor digitorum longus

Answer 15

• interosseous membrane
• lateral condyle of tibia
• superior three quarters of medial surface of fibula

Question 16

distal attachment of extensor digitorum longus

Answer 16

middle and distal phalanges of lateral four digits (2-5)

Question 17

innervation of extensor digitorum longus

Answer 17

deep fibular nerve

Question 18

main action of extensor digitorum longus

Answer 18

• dorsiflexes ankle joint
• extends lateral four digits

Question 19

proximal attachment of extensor hallucis longus

Answer 19

• interosseous membrane
• middle part of anterior surface of fibula

Question 20

distal attachment of extensor hallucis longus

Answer 20

dorsal aspect of base of distal phalanx of great toe

Question 21

innervation of extensor hallucis longus

Answer 21

deep fibular nerve

Question 22

main action of extensor hallucis longus

Answer 22

• dorsiflexes ankle joint
• extends great toe

Question 23

proximal attachment of fibularis tertius

Answer 23

• interosseous membrane
• inferior third of anterior surface of fibula

Question 24

distal attachment of fibularis tertius

Answer 24

dorsum of base of 5th metatarsal

Question 25

innervation of fibularis tertius

Answer 25

deep fibular nerve

Question 26

main action of fibularis tertius

Answer 26

- dorsiflexes ankle joint - eversion of subtalar joint

Question 27

what are the two muscles of lateral compartment of leg

Answer 27

fibularis longus fibularis brevis

Question 28

proximal attachment of fibularis longus

Answer 28

*head and superior* two thirds of lateral surface of fibula

Question 29

distal attachment of fibularis longus

Answer 29

- base of 1st metatarsal - medial cuneiform

Question 30

innervation of fibularis longus

Answer 30

superficial fibular nerve

Question 31

main action of fibularis longus

Answer 31

- weakly plantarflexes ankle joint - everts subtalar joint

Question 32

proximal attachment of fibularis brevis

Answer 32

*inferior* two third of lateral surface of fibula

Question 33

distal attachment of fibularis brevis

Answer 33

dorsal surface of lateral side of base of 5th metatarsal

Question 34

innervation of fibularis brevis

Answer 34

superficial fibular nerve

Question 35

main action of fibularis brevis

Answer 35

- weakly plantarflexes ankle joint - everts subtalar joint

Question 36

common fibular nerve divides into

Answer 36

superficial and deep fibular nerve

Question 37

motor supply of deep fibular (peroneal) nerve

Answer 37

tibialis anterior extensor digitorum longus extensor hallicus longus fibularis tertius

Question 38

cutaneous supply of deep fibular nerve

Answer 38

common digital nerve to 1st webspace

Question 39

deep fibular (peroneal) nerve

Answer 39

- nerve to anterior compartment - arises 出現 within fibularis longis at the level of neck of fibula - courses 沿著 along the anterior aspect of interosseous membrane to dorsum of the foot - accompanies 伴隨 anterior tibial artery - enters dorsum of the foot anterior to ankle - ends by supplying the skin between 1st - 2nd toes

Question 40

motor supply of superficial fibular (peroneal) nerve

Answer 40

fibularis longus and brevis

Question 41

cutaneous supply of superficial fibular (peroneal) nerve

Answer 41

medial and lateral cutaneous branch

Question 42

superficial fibular (peroneal) nerve

Answer 42

- nerve to lateral compartment - pierces 刺穿 the crucial fascia to become superficial midway down leg - passes in front of the ankle joint to the dorsum of the foot

Question 43

anterior tibial vessels - deep great (long) saphenous vein - superficial saphenous nerve - supply medial surface

Answer 43

anterior tibial vessels - deep great (long) saphenous vein - superficial saphenous nerve - supply medial surface

Question 44

what is saphenous opening

Answer 44

allow the passage of great saphenous vein

Question 45

arrangement of anterior ankle structures

Answer 45

from medial to lateral **T**ibialis anterior extensor **H**allicus longus anterior tibial **A**rtery anterior tibial **V**ein anterior tibial **N**erve extensor **D**igitorum longus ## Footnote tom has a very nice dog