LL3. anterior/posterior leg

Question 1

action of anterior compartment of leg

Answer 1

dorsiflexion and extension of toes (metatarsal, interphalangeal joint)

Question 2

Tibialis anterior origin

Answer 2

lateral tibia

Question 3

Tibialis anterior insertion

Answer 3

medial cuneiform

Question 4

Tibialis anterior action

Answer 4

inversion of foot
dorsiflexion

Question 5

anterior leg innervation

Answer 5

deep fibular nerve

Question 6

Extensor digitorum longus action

Answer 6

extends phalanges
dorsiflexion

Question 7

Extensor digitorum longus action origin

Answer 7

lateral condyle of tibia/medial fibula

Question 8

Extensor digitorum longus action insertion

Answer 8

lateral 4 digits

Question 9

Extensor digitorum longus action position/palpation

Answer 9

positioned laterally and deep to the tibialis anterior
Its four tendons can be palpated on the dorsal surface of the foot

Question 10

Extensor hallucis longus origin

Answer 10

medial surface of fibula

Question 11

Extensor hallucis longus insertion

Answer 11

big toe (hallucis)

Question 12

Extensor hallucis longus action

Answer 12

extends big toe

Question 13

does everyone have fibilaris tertius?

Answer 13

nope

Question 14

BLOOD SUPPLY to anterior leg

Answer 14

anterior tibial artery
-> pierces interosseous membrane to become anterior

Question 15

when does anterior tibial artery become dorsal pedis

Answer 15

after ankle joint -> feel pulse

Question 16

ANTERIOR TIBIAL STRESS SYNDROME

Answer 16

shin splints
microtrauma to tibialis anterior and periosteum of tibia

Question 17

general action of lateral leg

Answer 17

eversion and weak plantar flexion

Question 18

Peroneus (fibularis) longus origin

Answer 18

fibula

Question 19

cause of foot drop

Answer 19

damage to common fibular nerve
= no dorsiflexion

Question 20

Which muscle produces eversion at the subtalar joint?

Answer 20

fibularis tertius

Question 21

the nerve roots of the deep fibular nerve

Answer 21

L4-S1

Question 22

fibularis longus origin

Answer 22

superior/lateral surface of fibula
lateral condyle

Question 23

fibularis longus insertion

Answer 23

1st metatarsal and medial cuneiform bone

Question 24

fibularis longus action

Answer 24

weak plantar flexion
eversion
supports arch

Question 25

lateral leg innervation

Answer 25

superficial fibular nerve

Question 26

fibularis brevis origin

Answer 26

interosseus membrane

Question 27

fibularis brevis insertion

Answer 27

5th metatarsal

Question 28

fibularis brevis action

Answer 28

eversion

Question 29

is fibularis brevis or longus more superficial?

Answer 29

longus is superficial to brevis

Question 30

COMMON FIBULAR NERVE INJURY

Answer 30

- fractured neck of fibula = injures where nerve wraps round ⇒ foot drop - casts = compresses neck of fibula

Question 31

muscles of superior posterior leg

Answer 31

gastrocnemius soleus plantaris

Question 32

insertion of posterior superficial muscles

Answer 32

form calcaneus tendon = achilles

Question 33

innervation of deep posterior muscles

Answer 33

tibial branch of sciatic nerve

Question 34

blood supply to posterior deep muscles

Answer 34

posterior tibial artery (branch of popliteal artery)

Question 35

function of superficial posterior muscles

Answer 35

plantarflexion and flexion of toes

Question 36

function of deep posterior muscles

Answer 36

flexion of toes

Question 37

Gastrocnemius origin

Answer 37

medial condyle - m head lateral condyle - l head

Question 38

Gastrocnemius action

Answer 38

lot of force = plantarflexion (releve) flexion of toes flex knee -> tires easily

Question 39

gastrocnemius innervation

Answer 39

superficial fibular nerve

Question 40

Soleus origin

Answer 40

Originates from the soleal line of the tibia and proximal fibula

Question 41

Soleus action

Answer 41

plantarflexion (releve) flexion of toes contraction compresses veins for venous return -> postural function

Question 42

Plantaris origin

Answer 42

plantarflexion/knee flexion

Question 43

popliteus origin, insertion, action

Answer 43

lateral condyle proximal tibia, above soleus lateral rotation of femur to allow flexion of knee

Question 44

Flexor digitorum longus origin

Answer 44

medial tibia

Question 45

Flexor digitorum longus action

Answer 45

flexion of lateral 4 toes

Question 46

Flexor digitorum longus insertion

Answer 46

plantar surface of lateral 4 digits