Muscles of Leg

Question 1

what is the name of the oblique line on the posterior surface of tibia? What does it delineate

Answer 1

Soleal line

delineates the soleus muscle and popliteus

Question 2

What is the boundary of anterior compartment of the leg

Answer 2

encircling layer of deep fascia
anterior intermuscular septum
interosseous membrane
tibia and fibula

Question 3

What are the three muscles of anterior compartment

Answer 3

tibialis anterior
extensor hallucis longus
extensor digitorum longus

Question 4

what is the insertion of tibialis anterior?

Answer 4

base of the first metatarsal
medial cuneiform

On the medial side of the foot, and almost on the plantar surface

Question 5

What movement does tibialis anterior produce?

Answer 5

dorsiflexion and inversion

Question 6

EDL splits into three 3 components on the toes - where do they attach to?

Answer 6

middle component attaches to the base of middle phalanx

Lateral components join together to attach to the base of distal phalanx

Question 7

What is the name of the small tendon going to base of fifth metatarsal?

Answer 7

fibularis tertius

Question 8

What does “Timothy has a nastry, dirty toe” stand for

Answer 8

structures, from medial to lateral in the extensor retinaculum

Tibialis anterior, EHL, anterior tibial artery, deep perineal nerve, EDL, fibularis tertius

Question 9

What is the boundary of the lateral compartment

Answer 9

between anterior and posterior septa, encircling deep fascia, and the fibula

Question 10

What are the muscles of the lateral compartment

Answer 10

fibularis longus

fibularis brevis

Question 11

What’s the origin and insertion of fibularis longus?

Answer 11

proximal shaft of fibula
to the base of first metatarsal
crosses

Question 12

Which muscle has the same attachment as fibularis longus?

Answer 12

tibialis anterior

Question 13

Because of the crossing attachment of FL, what is one significant function of fibularis longus?

Answer 13

maintaining the arch of the foot

Question 14

What are the origin and insertion of fibularis brevis

Answer 14

distal shaft of the fibula, run along with FL, behind the lateral malleolus and insert into base of fifth metatarsal

Question 15

What is the boundary of superficial, posterior compartment of the leg?

Answer 15

encircling deep fascia
posterior intermuscular septum
transverse intermuscular septum

Question 16

What are the two main muscles of the superficial, posterior compartment of the leg

Answer 16

Gastrocnemius

Soleus

Question 17

What are the origin and insertion of gastrocnemius?

Answer 17

lateral and medial condyles of the femur to the calcaneus

Question 18

What is the origin and insertion of soleus?

Answer 18

oblique insertion across proximal fibula and tibia, insert into the same tendon as gastrocnemius

Question 19

There are two other small muscles in the posterior superficial compartment. What are they?

Answer 19

popliteus, from lateral condyle of femur to proximal tibia above soleus attachment

Plantaris, small, degenerating muscle

Question 20

What is the boundary of the deep, posterior compartment of the leg

Answer 20

tibia + fibula + intermuscular septum, transverse intermuscular septum

Question 21

What are the muscles of the posterior deep compartment of the leg?

Answer 21

tibialis posterior
flexor digitorum longus
flexor hallucis longus

Question 22

What are the origin and insertion of tibialis posterior

Answer 22

origin tibia and fibula, across interosseous membrane

insert into mostly the first metatarsa

Question 23

Why does tibialis posterior need to attach to the same location as tibialis anterior?

Answer 23

so inversion and eversion can be cancelled, and dorsiflexion can occur

Question 24

Do the muscles of the deep, posterior compartment run medially or laterally across the ankle joint?

Answer 24

Medially

Question 25

What is the insertion of FDL?

Answer 25

split into 4, insert into base of distal phalanx on the plantar surface

crosses superficial to FHL

Question 26

What does “Tom, Dick and Very Naughty Harry” stand for?

Answer 26

Tibial posterior, FDL, posterior tibial artery, vein and nerve, FHL

anterior to posterior across the medial aspect of the ankle joint, behind the medial malleolus