Knee and Lower Leg Flashcards
What unites the tibia and fibula?
Interosseous membrane
Between the fibula and tibia, which is the more medial one?
Tibia
True or false, the fibula is nonweightbearing
True! The tibia does all the weightbearing and is therefore much thicker
Useful radiograph of the parts of the tibia and fibula
What is the largest sesamoid in the body?
The patella
What is the definition of a sesamoid?
Bone formed within the tendon of a muscle
What stabilize the hinge-like motion of the knee?
The collateral ligaments. One on each side of the joint
Which ligaments are responsible for preventing anterior and posterior displacement of the tibia relative to the femur (respectively)
Anterior cruciate ligament
Posterior cruciate ligament
Another pretty nice radiograph of some of the bones of the knee area. Check it out if you want I guess. Idk, I’m not forcing you to. You do you, I just feel like it would be useful. Okay, bye have fun.
What type of joint is the knee joint?
Synovial, hinge joint. largest in the body
Okay, haha, we back at it with another radiograph of the bones of the knee. This one is also pretty good tho so I felt the urge to show it
Which structure improves the congruency between the femoral and tibial condyles during joint movement?
Menisci
Small fluid-filled, pal-like synobial sac that reduces friction and cushions pressure points between bones and tendones and muscles near joints
Bursa
Importance of the suprapatellar bursa
(Hint: vulnerability)
Vulnerable to infection following penetrating trauma
Allows spread of infection directly into knee joint
Functions of anterior compartment of the lower leg
Extends the toes
Inverts foot
Dorsiflexors of ankle
Which nerves innervate the posterior compartment of the lower leg?
Tibial Nerve
Major actions of the superficial group of the posterior compartment of the lower leg
Plantar flexors of the foot
Function of the popliteus
Medially rorate flexed knee
Flexes the knee
Unlocks knee by initiating lateral rotation of femur on tibia
In our everyday lives, what do the posterior superficial group compartment allow us to do?
Propel body forward off planted foot during walking
Elevate the body upward onto toes while standing
Major arteries of the knee
Just know the femoral, popileteal, anterior tibial, posterior tibial and peroneal
Function of the lateral compartment of the lower leg
Primarily everters of the foot
Also assist to plantar flex the ankle
Major veins of the legs diagram
On an exam, if something isn’t intact on a radiograph, assume it just isn’t intact/it’s torn
Idk what it means, just remember it
What color are ligaments on the MRIs she gives us?
mofucka Black
Diagram of the bursa of the knee
How far away are the stars?
Atleast 3 football fields
Inversion vs Eversion of the foot.
Inversion: Rotate sole of foot towards midline
Eversion: Rotate sole of foot away from midline
