Flashcards in Muscles of Leg Deck (26):
what is the name of the oblique line on the posterior surface of tibia? What does it delineate
delineates the soleus muscle and popliteus
What is the boundary of anterior compartment of the leg
encircling layer of deep fascia
anterior intermuscular septum
tibia and fibula
What are the three muscles of anterior compartment
extensor hallucis longus
extensor digitorum longus
what is the insertion of tibialis anterior?
base of the first metatarsal
On the medial side of the foot, and almost on the plantar surface
What movement does tibialis anterior produce?
dorsiflexion and inversion
EDL splits into three 3 components on the toes - where do they attach to?
middle component attaches to the base of middle phalanx
Lateral components join together to attach to the base of distal phalanx
What is the name of the small tendon going to base of fifth metatarsal?
What does "Timothy has a nastry, dirty toe" stand for
structures, from medial to lateral in the extensor retinaculum
Tibialis anterior, EHL, anterior tibial artery, deep perineal nerve, EDL, fibularis tertius
What is the boundary of the lateral compartment
between anterior and posterior septa, encircling deep fascia, and the fibula
What are the muscles of the lateral compartment
What's the origin and insertion of fibularis longus?
proximal shaft of fibula
to the base of first metatarsal
Which muscle has the same attachment as fibularis longus?
Because of the crossing attachment of FL, what is one significant function of fibularis longus?
maintaining the arch of the foot
What are the origin and insertion of fibularis brevis
distal shaft of the fibula, run along with FL, behind the lateral malleolus and insert into base of fifth metatarsal
What is the boundary of superficial, posterior compartment of the leg?
encircling deep fascia
posterior intermuscular septum
transverse intermuscular septum
What are the two main muscles of the superficial, posterior compartment of the leg
What are the origin and insertion of gastrocnemius?
lateral and medial condyles of the femur to the calcaneus
What is the origin and insertion of soleus?
oblique insertion across proximal fibula and tibia, insert into the same tendon as gastrocnemius
There are two other small muscles in the posterior superficial compartment. What are they?
popliteus, from lateral condyle of femur to proximal tibia above soleus attachment
Plantaris, small, degenerating muscle
What is the boundary of the deep, posterior compartment of the leg
tibia + fibula + intermuscular septum, transverse intermuscular septum
What are the muscles of the posterior deep compartment of the leg?
flexor digitorum longus
flexor hallucis longus
What are the origin and insertion of tibialis posterior
origin tibia and fibula, across interosseous membrane
insert into mostly the first metatarsa
Why does tibialis posterior need to attach to the same location as tibialis anterior?
so inversion and eversion can be cancelled, and dorsiflexion can occur
Do the muscles of the deep, posterior compartment run medially or laterally across the ankle joint?
What is the insertion of FDL?
split into 4, insert into base of distal phalanx on the plantar surface
crosses superficial to FHL