Test 2.1 Flashcards
Which structures does the patellofemoral joint articulate
Patella with the femur
Which motions do the femoral condyles execute
Rolling and gliding
When does the rolling movement occur at the knee
The initiation of flexion
When does the sliding movement occur at the knee
Occurs at the end of flexion
What is the screw home mechanism
It is when the knee moves towards terminal extension, the tibia ER about 20 degrees on the fixed femur
What is the ROM for the knee for flexion and extension
Flexion = 135
Extension = -10
What is arthrology
When the knee supports the weight of the body and transmits forces from the ground up
True or false
Joint capsule surrounds the entire articulation
True but it doesn’t in the anterior portion
What is the surface of the tibia covered by
Fibrocartilaginous menisci
True or false
The lateral menisci is attached to the LCL
False
Which menisci is tighter the lateral or medial
Lateral
The tendons of the semimembranosis sends fibers to what?
Posterior edge of medial menisci
Where does the popliteus muscle send fibers?
To lateral menisci
Where does the meniscofemoral ligament extend to
From the lateral meniscus (post) to the inside of the medial condyle near the PCL
What are coronary ligaments
Meniscotibial
Are MCL and LCL collateral ligaments or cruciate ligaments
Collateral ligaments
What’s the characteristic of the MCL
Flat band, attaches above medial condyle of femur and below to medial surface of tibia
What’s the characteristic of the LCL
Cordlike, attached above lateral condyle of femur and below the head of fibula
Which force does the MCL and LCL resist
MCL resist valgus force
LCL resist varus force
Is the ACL intra-articular or extra-articular and what is it bathed in
Intra-articular and bathed in synovium
What are the threes bundles of fibers that are within the ACL
Anteromedial, intermediate and posterolateral
What are the two bundle of fibers that are within the PCL
Anteromedial and posterolateral
What are supporting posterolateral ligaments
Oblique popliteal
Arcuate popliteal
Arcuate complex
What does the arcuate complex consist of
Arcuate ligament
Posterior lateral capsule and portion of the PCL
LCL
Fabellofibular
Where does the arcuate popliteal run
From head of fibula, over the popliteus muscle to attach into the posterior joint capsule
Where does the oblique popliteal run
From semimembranosis on posterior aspect of capsule, then from that tendon to the medial aspect of the lateral femoral condyle (post)
Where is the thickest articulat cartilage in the body
Posterior surface of patella
Which muscle group stabilizes the patella
Quads
What anchors the patella distally
Patellar tendon
Does vastus lateralis and IT band assist with lateral or medial stabilization
Lateral
From full flexion to extension how much does the patella slide
7-8 cm
At what point of flexion does the odd facet on into contact?
135 degrees of flexion
How is the Q-angle measured
From ASIS to mid patella and then another line from the mid patella to tibial tuberosity
What’s the normal Q-angle range for males and females
Males - 10-14 degrees
Females- 15-17 degrees
What does q-angle represent
Valgus stress on the knee
What does a very small q-angel result in and what does a larger q-angle result in
Very small= genu varum
Greater than 17 degrees results in genu valgum
What structures does the Tibiofemoral joint articulate
The femur with the tibia
