KIN 100 - Knee Joint (lecture 22) Flashcards
What is the largest and most superficial joint in the body
Knee joint
What are the 3 articulations of the knee joint
Lateral femorotibial
Medial femorotibial
Patellofemoral
(not the fibula)
What type of synovial joint is the knee joint
modified hinge
(b/c it allows some rotation in addition to flexion and extension movements)
What is the knee joint also referred to as
the bicondylar joint
What are the fibrocartilaginous plates of the knee joint , where are they located and what is their purpose
plates called menisci rest on the tibial plateau and help to deepen the articular surface
What are the intrinsic ligaments of the knee joint
- Patellar ligament
- Medial/tibial collateral ligament
- Oblique popliteal ligament
- Arcuate popliteal ligament
What are the extrinsic ligaments of the knee joint
- Lateral/fibular collateral ligament
- Anterior cruciate ligament
- Posterior cruciate ligament
Oblique popliteal ligament is an extensor of what
the tendon of semimembranosus
arcuate popliteal ligaments arches over what
tendon of popliteus muscles
What are the cruciate ligaments of the knee as referred to as
internal ligaments
(they are located within the fibrous joint capsule but are excluded from the synovial capsule)
Where does the anterior cruciate ligament attach to
attaches on the anterior aspect of the intercondylar eminence and passes to the lateral femoral condyle
Where does the posterior cruciate ligament attach to
posterior aspect of the intercondylar eminence and passes to the medial femoral condyle
Function of the ACL
prevents the tibia from moving anteriorly under the femur and is tight on knee extension
(tested with the anterior drawer test)
Function of the PCL
prevents the tibia from moving posteriorly under the femur and is tight on knee flexion
(test with the posterior drawer test)
What are the menisci of the knee joint anchored by
External margins: anchored to the tibia by coronary ligaments
Internal margins: thin and unattached to the bone
