Ther-Ex chapter 21

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  1. What is the screw home mechanism
    the rotation that occurs between the femoral condyles and the tibia during the final degrees of extension. With the tibia fixed the femur rotates medially and the tibia rotates laterally
  2. How is the ACL oriented between the femur and tibia
    Lateral femoral condyle to medial tibia
  3. How is the  PCL oriented between the femur and tibia
    Medial femoral condyle to lateral tibia
  4. The lateral collateral ligament resists what kind of stress
    Varus Stress
  5. The medial collateral ligament resists what kind of stress
    Valgus stress
  6. What connects to the Gerdys tubercle
    The IT band
  7. What muscles connect to pes anserine
    sartorius, gracilis, semitendinosus
  8. What degree ROM is needed to rise from a chair and climb stairs
    90 and 100
  9. Describe the grades and differences between ligament sprains
    • Grade 1 mild pain, local tenderness, no laxity
    • Grade 2 mod pain, point tenderness, edema, some fibers torn/stretched, mild to moderate laxity
    • Grade 3 severe pain at time of injury, edema, complete tear
  10. Deformity at the knee joint associated with OA is classified as
    genu varum
  11. What are some affects of OA on the knee joint
    • deformity-genu varum
    • instability-capsular laxity, decreased stability of meniscus, inhibited quads
    • functional limitations- decreased ROM in flexion more than extension, impaired balance
  12. What are some procedures to repair articular cartilage defects
    • autograft transplant-from non-WB surface
    • chondrocyte implantation-harvested/cultured
    • allograft-cadaver tissue harvested/cultured
  13. After articular cartilage repair what is critical during therapy to
    • adherence to weight bearing restrictions especially if large area.
    • protective bracing in extension, remove for exercise only
    • low impact allowed 6 months post
    • high impact allowed 12 months (depending size of lesion)
  14. Fully constrained TKA are used in what circumstances
    • low demand patients with knee joint instability
    • collateral ligaments are not intact
  15. This type of TKA implant offers some stability and is more mobile
    semi-constrained (most common)
  16. Weakness in what muscle will allow excessive lateral patellar glide
    Vastus medialis oblique (VMO)
  17. Pronation of the foot has what effect on the Q-angle
    increases Q-angle
  18. It band tightness will prevent what type of glide of the patella
  19. How is Q-angle measured
    ASIS through center of patella and tibial tubercle through center of patella
  20. Q-angle is influenced dynamically and passively by what
    Dynamically by the quadriceps line of pull and passively by ligamentous, capsular and retinaculum
  21. Plica is also known as what
    movie theater knee
  22. Tight hamstrings can cause what in the knee
  23. What are some conservative treatments for patellofemoral dysfunction
    • Pateint Ed-posture/positioning/avoid exacerbating activities
    • Patellar mobilizations-not laterally
    • McConnell Taping-stretches lateral retinaculum
    • VMO strengthening-no open chain extension
    • Hamstring & It Band stretching
Card Set
Ther-Ex chapter 21
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