Lecture 19 - Knee Flashcards
What type of joint is the knee?
modified hinge joint
What type of joint is between the patella and patellar surface of the femur?
gliding joint
Both articular facet surfaces of the tibia have corresponding what?
corresponding menisci - lateral and medial
movements of knee
- flexion
- extension
- medial rotation (25 degrees with flexion)
- lateral rotation (25 degrees of extension)
largest sesamoid bone in the body
patella
what does the vertical ridge divide the articular surface of the patella into
- large lateral articular surface
- smaller medial articular surface
shape of patella
triangular (apex lies inferiorly)
What is the patella an attachment for? What does it do?
- quadriceps muscle
- thought to increase the pull of the quadriceps
innervations of knee joint
nerves that cross the joint:
- femoral
- obturator
- sciatic
Is the fibrous capsule of the knee thick or thin?
quite thick
Where is the fibrous capsule of the knee deficient?
deficient anteriorly and is replaced by the fused tendons of the quadriceps musculature and its expansion
consists of deep fibers of the vastus intermedius that attach to the capsule to pull the capsule out of the joint upon extension to prevent injury
articularis genu
innervation of articularis genu
femoral nerve
very extensive and lines the fibrous capsule
synovial membrane
what does NOT cover the articular surfaces
synovial membrane
about how many bursae are around the knee
16 or so