week 3 - Knee Flashcards
define enthesis
point where tendon attaches to bone
what is intercondylar tunnel projection
knee flexed and tube 45 degrees caudal angulation
what is tangential skyline or sunrise projection
knee fully flxed and tube 10 degree cepthalic angulation
what is sclerosis
the thickening of bone / increase in compact bone
an increase in radiopacity
what is butcherising
bone respondoing to an increase in load - SAID LAW
which muscle is both intracapsular and extracapsular
popliteus
what is the function of popliteus
knee rotation
how can you tell the difference between an AP view and the intercondylar projection
the presence of the intercondylar notch
function of articularis genu
pulls synovial membrane of the knee superiorly during extension to prevent impingement between the femur and patella
origin of articularis genu
distal femur deep to vastus inermedius
insertion of articularis genu
suprapatellar bursa on the joint capsule
what structure does the articularis genu pull upwards to prevent impingement between the femur and tibia
suprapatellar bursa
what is bipartite, tripartite and multipartite patella
a normal variant of the patellar not fusing properly
what is oscfabella
most common ossicle thats on the lateral head of gastrocnmius - just above the tibiofemoral joint line
what view is an oscfabella most likley to be seen on
lateral
what is osccymella
an ossicle sat within the tendon of popliteus that sits sithin the femoral poplteal goroove
what view is an osccymella most seen on
AP
what is oscmeniscal
a rare focal ossification within the meniscus that mostly occurs in the posterior horn of the medial meniscus
what is a dorsal defect of the patella
a small osteo lytic defect on the superior lateral dorsal surface of the patella (a radioluscent part within the knee)
what is the normal femoral value for axial relationship of the knee
average - 81
min - 75
max - 85
what is the normal tibial value for axial relationship of the knee
av - 93
min - 85
max - 100
what is the patella length PL
greatest diagnol dimension between the superior and inferior poles
what is the patella tendon length
distance measure is between the insertion points of the posterior tendon surface at the inferior patellar pole and the notch of the tibial tubercle
name 2 special /non routine radiographic views of the knee
sunrise projection
intercondylar tunnel
