PHTY100 Lecture Notes - Lecture 3: Adductor Tubercle Of Femur, Oblique Popliteal Ligament, Posterior Cruciate Ligament
ANAT week 3 LB Knee joint
- Biggest synovial joint in body but still not a lot of synovial fluid in it
Two synovial joints inside one cavity
- Tibiofemoral component
oBetween tibial and femoral condyles
- Patellofemoral component
oBetween patellar surface of femur and articular surface of patella
- Largest synovial joint in the body
Tibiofemoral joint
- IN AN EXAM, IF ASKED TO CLASSIFY A JOINT YOU NEED TO WRITE THREE PARTS TO
GET THE MARK
- Classification
oSynovial, biaxial, condyloid
- Movement
oFlexion 140 degrees, extension 0 degrees transverse axis
oInternal rotation 30 degrees, external rotation 40 degrees longitudinal axis
Articular surfaces of tibiofemoral joint
- A lot of reliance on connective tissue components to give stability in joint as tibia and
femur don’t fit together nicely bones are not very congruent
- Femur – male surface Medial and lateral femoral condyles
oConvex in both planes, longer AP than transverse
oMedial condyle is longer and a bit more curved than lateral condyle
- Tibia – female surface Medial and lateral tibial condyles
oMostly flat in both planes, separated by intercondylar area
oMedial condyle is larger, oval and slightly more convex than lateral condyle
oPatella only ever articulates with the femur
oTibia = second longest bone in body
- Joint capsule
oNo complete independent capsule
Deficient anteriorly, replaced by tendon of quadriceps femoris
Posterior and lateral capsule more as expected
oMuch additional ligamentous strengthening
Receives contribution from biceps femoris, semimembranosus,
quadriceps femoris, iliotibial band
- Synovial membrane
oLines the capsule
oExtensive and complex
oCommunication with a number of key bursa
oSome of the ligaments are in between the knee but outside the capsule
Patellar retinacula
- Medial and lateral patellar retinacula
- Aponeurotic expansions of vastus lateralis and medialis reinforce knee structure
and help keep everything in place
- Aponeurosis = aponeurosis is a flat sheet of connective tissue that acts like a tendon
(tendons that attach muscles to bones)
- Complex arrangement made up of 3 layers
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Biggest synovial joint in body but still not a lot of synovial fluid in it. Tibiofemoral component: between tibial and femoral condyles. Patellofemoral component: between patellar surface of femur and articular surface of patella. In an exam, if asked to classify a joint you need to write three parts to. Movement: flexion 140 degrees, extension 0 degrees transverse axis, internal rotation 30 degrees, external rotation 40 degrees longitudinal axis. A lot of reliance on connective tissue components to give stability in joint as tibia and femur don"t fit together nicely bones are not very congruent. Femur male surface medial and lateral femoral condyles: convex in both planes, longer ap than transverse, medial condyle is longer and a bit more curved than lateral condyle. Deficient anteriorly, replaced by tendon of quadriceps femoris. Posterior and lateral capsule more as expected: much additional ligamentous strengthening. Receives contribution from biceps femoris, semimembranosus, quadriceps femoris, iliotibial band.
