7.3_leg (pt 1)

Question 1

1. ant comp. mus (leg) *4
2. lat. comp. mus (leg)
3. post comp. mus (leg)

Answer 1

ant. compartment
mus.
1. tibialis anterior 
2. extensor _digitorum longus 
3. extensor _hallucis longus 
4. fibularis (peroneus) tertius

nerves

• ALL mus innervated by
• deep fibular nerve

Question 2

attachments

• ant. compartment mus (leg)

1. tibialis anterior
   prox *2
   dist *2

Answer 2

- tibialis anterior
prox= 
1. lat. surf._sharf tibia 
2. adj. interosseous memb
dist= 
1. med. and inf. surf_med. cuneiform 
2. adj surf_vase met.t-1

Question 3

attachments

• ant. compartment mus (leg)

2. extensor _digitorum longus
   prox3
   dist1

Answer 3

- extensor _digitorum longus 
prox *3
1. lat. condyle_tibia 
2. sup. 3/4_med. surf fibula 
3. interosseous memb.
dist *1
1. middle and dist. phalanges_lat. four digits (extensor expansion)

Question 4

attachments

ant. compartment mus (leg)

• extensor _hallucis longus
  prox2
  dist1

Answer 4

- extensor _hallucis longus 
prox *2
1. middle pt._ant. surf._fibula
2. adj surf._interosseous memb
dist *1
1. dorsal surface_base of distal phalanx (great toe= hallux)

Question 5

attachments

ant. compartment mus (leg)

• fibularis (peroneus) tertius
  prox3 (same as tib. ant. mus)
  dist1

Answer 5

- fibularis (peroneus) tertius
prox *3 (same as tib. ant. mus)
 1. lat. condyle_tibia 
2. sup. 3/4_med. surf fibula 
3. interosseous memb.
dist *1
1. dorsum_base of 5th met.t

Question 6

actions (brief)
- ant. comp. mus (leg) ***ALL have 2 actions

1. tibialis anterior *2
2. extensor _digitorum longus *2
3. extensor _hallucis longus *2
4. fibularis (peroneus) tertius*2

Answer 6

actions

1. TA = dorsi flex ank, inverts foot
2. EDL = dorsiflex ank, extends lat. digits 2,3,4,5
3. EDH = dorsiflex ank, extend great toe
4. FT/P = dorsiflex ank, aids_eversion foot

Question 7

actions
- ant. comp. mus (leg) *ALL have 2 actions

1. tibialis anterior
2. extensor _digitorum longus
3. extensor _hallucis longus
4. fibularis (peroneus) tertius

Answer 7

• actions (mus ant. comp.)

tibialis anterior

1. dorsiflex ankle
2. inverts foot

extensor_digitorum longus

1. dorsiflex ank
2. extends lat. digits 2,3,4,5

extensor_hallucis longus

1. dorsiflex ank
2. extend great toe

Question 8

nerve supply

ant comp mus (leg) * ALL mus innervated by..

Answer 8

• deep fibular nerve (`L4, L5)

Question 9

actions

- ant comp. mus (leg)

Answer 9

• actions (mus ant. comp.)

tibialis anterior

1. dorsiflex ankle
2. inverts foot

extensor_digitorum longus

1. dorsiflex ank
2. extends lat. digits 2,3,4,5

extensor_hallucis longus

1. dorsiflex ank
2. extend great toe