knee ligaments Flashcards
major 5 ligaments associated with knee joint
- patellar ligament
- tibial collateral ligament
- fibular collateral ligament
- anterior cruciate ligament
- posterior cruciate ligament
what is the patellar ligament the continuation of
quadriceps femoris tendon
function of collateral ligaments
stabilize hinge-like motion of the knee
attachments of fibular collateral ligament
- superiorly to lateral femoral epicondyle
- inferiorly to depression on lateral surface of fibular head
by what is the fibular collateral ligaments seperated from the fibrous membrane
a bursa
attachments of tibial collateral ligament
- fibrous membrane
- superiorly to medial femoral epicondyle
- inferiorly to medial margin and medial surface of tibia
behind which attachments is the tibial collateral ligament attached to the tibia
attachments of sartorius, gracilis and semitendinosus tendons
where are the two cruciate ligaments situated
in intercondylar region of the knee
what do the cruciate ligaments interconnect
femur and tibia
how does the anterior cruciate ligament run
- attaches to facet on anterior part of intercondylar area of tibia
- ascends posteriorly
- attaches to facet at back of lateral wall of intercondylar fossa of femur
how does posterior cruciate ligament run
- attaches to posterior aspect of intercondylar area of tibia
- ascends anteriorly
- attaches to medial wall of intercondylar fossa of femur
what does the anterior cruciate ligament prevent
anterior displacement of tibia relative to femur
what does posterior cruciate ligament restrict
posterior displacement
what are the surfaces of the knee joint in flexion
curved and rounded areas on posterior aspects of femoral condyles
where do the surfaces of the knee joint move to when extended
broad and flat areas of inferior aspects of femoral condyles
2 components of locking mechanism
- change in shape and size of femoral surfaces that articulate with tibia
- medial rotation of femur on tibia during extension
what does medial rotation and full extension of the femur on the tibia do
it tightens all the associated ligaments
what other feature keeps the knee extended when stanting
the situation of the body’s center of gravity
which muscle unlocks the knee by initiating lateral rotation of the femur on the tibia
popliteus muscle
which arteries suplly the kne ejoint
- femoral
- popliteal
- lateral circumflex fermoral
- circumflex fibular
- anterior tibial artery
what do the vesself form around the kne ejoint
anastomotic network
by branches of which nerves is the knee joint innervated
- obturator
- femoral
- tibial
- common fibular
