Flashcards in Workbook - Anterior and medial compartments of the thigh Deck (90)
What bones are involved in the knee joint? (3)
Femur, tibia and patella.
What are the 3 articulations at the knee joint?
What type of bone is the patella?
Triangular sesamoid bone.
-has a base(sup), an apex (inf) and 2 surfaces
What tendon does the patella develop in?
What are the 2 surfaces of the patella?
What are the 2 facets on the patella and where are they located?
Lateral and medial facets.
-on the articular surface
What articulates with the lateral facet of the patella?
Lateral condyle of the femur.
What articulates with the medial facet of the patella?
Medial condyle of the femur.
Which quadriceps muscle pulls at a more oblique angle than the others, and what effect does this have?
-prevents patella from being pulled too laterally
What other structure prevents the patella from being pulled too laterally?
Bony ridge on the lateral femoral condyle.
Why are patella fragments not avulsed after a direct blow to the patella?
Quadriceps tendon remains intact and hold them together.
Are the bones of the knee joint a good fit?
No, they are quite incongruent.
What are the menisci and where are they located?
2 fibrocartliaginous c-shaped cartilages in the knee.
-1 lateral, 1 medial
-improve congruency of the knee
What are the lateral and medial menisci interconnected by anteriorly?
What is the medial menisci attached to?
Joint capsule and tibial collateral ligament.
What is the lateral menisci attached to?
-unattached to capsule >> more mobile
Why are the medial menisci and tibial collateral ligament often injured simultaneously?
Medial menisci is firmly attached to the tibial collateral ligament.
What are the intrinsic ligaments of the knee?
Cruciate ligaments (ant & post).
-interconnect tibia and femur
What are the attachments of the anterior cruciate ligament?
-Ant intercondylar region of tibia
-Lat femoral condyle
What are the attachments of the posterior cruciate ligament?
-Post intercondylar region of tibia
-Med femoral condyle
What is the function of the anterior cruciate ligament? (2)
-Prevents hyperextension of the knee
-Prevents anterior displacement of the tibia on the femur
What is the function of the posterior cruciate ligament? (2)
-Prevents hyperflexion of the knee
-Prevent posterior displacement of the tibia on the femur
Which ligament is the main stabiliser of the flexed knee when weight-bearing?
Posterior cruciate ligament.
What are the main extrinsic ligaments of the knee? (3)
-Tibial collateral ligament
-Fibular collateral ligament
What is the patellar ligament a continuation of?
What are the attachments of the fibular collateral ligament?
-Lateral femoral epicondyle
-Lateral fibular head
What is the function of the fibular collateral ligament?
Prevents adduction of the knee.
What are the attachments of the tibial collateral ligament?
-Medial femoral epicondyle
What is the function of the tibial collateral ligament?