Thigh and Knee Flashcards
Quad tendon is ____ the patella.
above
Patellar tendon is _____ the patella.
below
Collateral ligaments are always on the ______.
outside
Name and describe the collateral ligaments in the knee.
- Medial collateral ligament is longer and bigger
- Lateral collateral ligament has IT band running on top of it
Describe the ACL.
- Anterior cruciate ligament (ACL) attaches on anterior of tibia and attaches on
posterior of femur - Protects from any blow from behind
- Hamstrings protect and prevent this movement
Describe the PCL.
- Posterior cruciate ligament (PCL) attaches on the posterior of the tibia and attaches on the anterior of femur
- Protects from blow to shin or back of the thigh
Describe the meniscus.
- One on medial and one on lateral side
- Donuts
- Made of cartilage
- Does not have very good blood supply
Where does the gastrocnemius attach?
above the joint line of the knee
Where do the hamstrings attach?
below the joint line of the knee
Why can we get knee injuries from simple forces?
- Very unstable joint when looking at just the bony structure
- Not very strong or supported by anatomy
The patella increases mechanical advantage of the ____.
quads
What are the 2 categories of patellar alignment?
- Alta: patella sits up on the quad (too high)
- Baja: patella sits too low towards tibia (too low)
What does patellar alignment affect?
- Can affect flexion/extension
- Affects quad strength
- Contraction in quad can pull knee cap up higher
What are the 2 categories of tilt component of the patella?
- Medial: muscles on medial side are tighter
- Lateral: muscles on lateral side are tighter
- muscles in leg affects which way it sits
What does having a tilt component of the patella do? How does it affect you?
- Uncomfortable
- Decreased strength
What causes rotation of the patella?
- Caused by muscles
- Outside quads being tight can pull bottom lateral part of the patella up
- Can also have it where medial side comes up (more rare because inside muscles are weaker)
What is Genu Valgum?
- Pigeon toed
- Knees go into the centre towards each other
What is Genu Varum?
- Bowlegged
- Knees push outward
What is Genu recurvatum?
hyperextended
What does having Genu Valgum, Varum, or recurvatum mean? When should we be concerned?
- Everybody goes through all 3 stages when growing
- need to be over the age of 15 to see any permanent alignment
- Means you have malalignment or something that is tight or weaker
Wide hips = ______ Q angle
bigger
What is the normal Q angle for men?
5-10 degrees
What is the normal Q angle for women?
10-15 degrees
Describe the movements at the knee.
- flexion/extension/hyperextension
- Medial tibial rotation/lateral tibial rotation
- Knees need to be able to squat
What is a functional test for the knees?
- squat test
- Squat, bounce, up
- Shows leg and knee can weight bear
- Shows that muscles all work
What is the MOI for a MCL sprain?
- Always sprained from a blow coming in from the lateral side
- Lateral blow = valgus force
What are the signs and symptoms for a MCL sprain?
- clear swelling
- Generally swelling with entire knee
- Bruising will be over whichever structure you damaged
- Bruising over top MCL
- Pain
- redness/heat
- Deformity at grade 2 (can feel), deformity at grade 3 (may be able to see)
What can lots of swelling during a MCL sprain do?
- can make it look like the knee cap is sitting in the wrong spot
- Swelling can push patella up or to either side
- Could be dislocated
In grade 2 or 3 MCL sprain, we can also have what accompanying the injury?
- a muscle strain of adductors accompanying this (Adductors run on medial side, some run across knee)
- meniscus injury (Pieces of MCL attach to medial meniscus)
How do we manage a grade 1 MCL sprain?
- Walking, should be able to walk normal
- Speed healing
- Decreasing pain and inflammation
How do we manage a grade 2 MCL sprain?
- Limping, physically lack of function
- Need support, not too much
- Going to have laxity to the inside, always feel like knee is caving in
- May want crutches, depends on them and their level of function
- Crutches to make gait pattern as normal as possible
How do we manage a grade 3 MCL sprain?
- See a doctor
- Get x-rays done
- May need surgery (not common)
- Needs lots of stability
- Lots of adductor strengthening
Why is the LCL more difficult to sprain than the MCL?
IT bands support the outside
What is the MOI for a LCL sprain?
- Blow from medial side
- Blow from medial side = varus
What are the signs and symptoms of a LCL sprain?
- Pain
- Clear swelling
- Bruising over lateral side
- redness/heat
- Might see deformity of patella position based on how much swelling you have
- Grade 1, 2, 3
How do we manage LCL sprains?
- Very rare to surgically repair because of IT band
- Same as MCL
- Decrease pain and inflammation
- Get function back
What is the special test for MCL sprains?
- valgus stress test
- lateral force from lateral side
What is the special test for LCL sprains?
- varus stress test
- medial force from medial side
What is the positive test for valgus and varus stress tests?
- Grade 1 positive test: pain
- Grade 2 positive test: pain and laxity, moves farther than it should
- Grade 3 positive test: no pain, lots of laxity
What is the MOI for a ACL sprain?
- Tibia going forward, femur going backwards
- Somebody lands or hits you in calf going forward
- Blow on femur going backwards with feet planted (less common)
- Need failure of hamstrings to get this injury
- may hear pop
More ___ get this injury than _____.
men>women
What are the signs and symptoms for a ACL sprain?
- bloody inflammation
- Bruising
- redness/heat
- Whole knee looks swollen and bruised
- Grade 1, 2, 3