Q5: Anatomy of Knee Flashcards
ginglymus (hinge joint) allowing flexion & extension (slight medial & lateral rotation)
Knee
weak in bony arrangement but this is compensated for through the support of ligaments & musculature
Knee
designed primarily to provide stability in weight bearing & mobility in locomotion
Knee
Bones in the anatomy of the knee
distal end of femur
tibia
patella
articulates the tibia & patella; has 2 condyles, lateral & medial (larger from front to back) which form a hollowed area to receive the patella
distal end of femur
consists of 2 tuberosities designed to receive the condyles of the femur; tuberosities divided posteriorly by a groove called the popliteal notch
tibia
largest sesamoid bone in the body & lies within the tendon of the quadriceps muscle; gives anterior protection to the knee joint & increased leverage to the knee of extension
patella
3 articulations
between the 2 femoral condyles & menisci
between the tibia & menisci
between the patella & femur
5 functions of the Menisci
- deepen articular surface for femur
- absorb shock
- provide stability to joint
- tighten cruciate ligaments & restrict ROM
- lubricate joint slightly
C-Shaped Meniscus
Medial meniscus
O-Shaped Meniscus
Lateral meniscus
lines all of the articular surfaces & is internal to the cruciate ligaments
synovial membrane
protective synovia-filled sacs in tissue sites that otherwise would become irritated because of friction
bursae
How many bursae are in the knee
11
attaches below and in front of the tibia on medial side proceeding backwards to the inner surface of the lateral condyle; prevents anterior displacement of the tibia in relationship to the femur; also stabilizes the tibia against abnormal internal & external rotation
Anterior Cruciate ligament (ACL)