Posterior Leg Flashcards
where do the gastrocnemius muscles insert?
posterior surface of calcaneus
Achilles tendon
what is the function of the gastrocnemius muscles?
plantar flexion, and flexes leg at the knee joint
what is the origin of the gastroc muscles and what joint does it cross?
superior to femoral condyles and crosses the knee joint
____ head of gastroc may have a sesamoid bone close to its proximal attachement called?
-fnct of this and fractrure can cause?
Lateral and fabella
-could provide leverage for lateral head
painful fabellar stress fracture may accompany total knee replacement
soleus
A) location,
B) origin and insertion
C) function
A)located deep to gastroc muslces,
B) origin is posterior tibia and fibula, and inserts in achilles tendon
C) plantar flexion
what makes up the triceps surae
gastrocs, and soleus, gives calf prominence
where is the plantaris located?
on top of soleus deep to gastroc, origin is lateral femor insertion is Achilles tendon
what is the function of the plantaris
weak plantarflexion, and leg flexion
proprioceptive organ for foot position bc of increased proprioceptive receptor end organs
Plantaris long tendon commonly used in surgery of what?
hand tendons
rupture of plantaris due to violent ankle movements can be caused from what
sudden dorsiflexion of ankle joint
popliteus function
unlocks extended leg by laterally rotating femur on a stationary tibia
also flexes leg weakly
where are the superior medial and lateral genicular arteries located?
just superior to the heads of the gastrocnemius
what artery comes off the posterior tibial artery in the knee
fibular collateral artery
what artery comes off the anterior tibial artery in the knee area?
anterior tibial recurrent artery
flexor hallucus longus origin and insertion
deep to soleus, lower posterior fibula, passes deep to flexor retinaculum and crosses under foot to go to big toe
flexor hallucus longus occupies shallow groove on
sustentaculum tali, and crosses deep to FDL tendon
where is the groove for the flexor hallucus longus tendon on the talus bones located?
between the tubercles of the talus on the posterior side
does the FHL cross deep or superficial to the FDL?
it crosses deep to it
Function of the FHL
flexes great toe
plantarflexion of foot
where is the origin of the FDL
posterior tibia
function of FDL and where on the phalanx does it attach
flexes lateral four digits
plantarflexes foot at the ankle joint
attaches at the distal phalanxs of these digits
Location of Tibialis posterior
between FDL and FHL and deepest muscle
on interosseous membrane
function of tibialis posterior
inversion and plantarflexion
Tibial nerve ends by dividing into the what
medial and lateral plantar nerves
