Flashcards in Arteries of the lower limb: in the leg Deck (14):
Which branches of the popliteal artery supplies the knee joint?
Where is the popliteal artery's position as it moves through the popliteal fossa?
sandwiched between the popliteus and gastrocnemius
Where does the popliteal artery terminate and what follows?
at the lower border of the popliteus
terminates into anterior and posterior tibial arteries
describe the course of travel of the posterior tibial artery
continues inferior along surface of deep muscles e.g. tibialis posterior
how does the posterior tibial artery enter the sole of the foot?
accompanies tibial nerve and enters the sole of the foot via the tarsal tunnel (anterior to tibial)
which artery branches from the posterior tibial artery and where does it supply?
the fibular artery branches from the posterior tibial artery and supplies the lateral leg
What is the course of travel of the anterior tibial artery from the popliteal artery?
it passes anterior of tibia and fibula through a gap in the interosseous membrane
then moves inferiorly down the leg into the foot
Which artery does the anterior tibial artery become in the foot?
dorsalis pedis artery
clinical: popliteal aneurysm
what is an aneurysm?
dilation of an artery to become greater than 50% of it's original diameter
What is the popliteal fascia layer?
a tough and non extensible layer
the roof of the popliteal fossa
what can an aneurysm of the popliteal artery lead to and why?
consequences to other structures within the popliteal fossa due to the popliteal fascia being a tough and non extensible layer and an aneurysm is when the artery's diameter increases more than 50% of its normal diameter
which structure is most prone to become affected if there is an aneurysm of the popliteal artery? how will this present?
present as leg anaesthesia or loss of leg motor function
how can an aneurysm of the popliteal artery be detected?
obvious palpable pulsation in the popliteal fossa with abnormal arterial sounds