Joints Flashcards
Physical activity promotes good joint health because of what?
- increases muscle tone which helps to stabilize joints
- causes weeping lubrication which is when synovial fluid seeps into the hyaline cartilage
What happens to the synovial fluid when a joint is under pressure?
The viscosity of the synovial fluid increases
What is the process called when a material (such as an intervertebral disk) absorbs water?
Imbibition
The knee has menisci and the shoulder has…
a labrum
Which movement is worse for the knee?
Medially turning the knee
There are three main functional and structural classifications of joints. Which classification has an outer fibrous membrane and an inner membrane?
Synovial
Caused by repetitive overuse
Tendonitis
Muscle or tendon that has been over-stretched or torn
Strain
Due to compression and shear stress
Cartilage tears
Ligament that is over-stretched or torn
Sprain
Ankle inversion
Stretching or tearing of the ATF and/or CF ligaments
Can be caused by repetitive impact
Bursitis
What is not part of a synovial joint?
Ligaments
When performing a squat, what are two reasons why the knee joint should not decrease below 90 degrees?
A deep squat (below 90 degrees) could strain the quad tendon and patellar ligament
The deeper the squat the less contact the femur has with the menisci on the tibia, thus pinpointing all the pressure on a smaller and smaller area.
Is on a full stretch when the knee is fully extended
ACL
Keeps the tibia from moving in a posterior direction
PCL
Stretched and/or injured from a medial strike to the knee
LCL
A common manner of injury is planting the foot and turning the knee medially
ACL
Keeps the tibia from moving in an anterior direction
ACL
Stretched and/or injured from a lateral strike to the knee
MCL
Inversion is far more common than eversion. Why?
The lateral ligaments of the foot are smaller in size and fewer than the medial ligaments of the foot
What is atlantoaxial instability (AAI)?
It is when there is excessive anterior translation of C1 relative to C2 during neck flexion
More cartilage is worn away than replaced
Osteoarthritis
Joint swelling and pain with an unknown cause, but often attributed to an autoimmune reaction
Juvenile Rheumatoid Arthritis