knee anatomy review

Question 1

what are the three joints of the knee region

Answer 1

tibiofemoral

patella-femoral

proximal tibiofibular

Question 2

what is larger on the patella the medial or the lateral facet

Answer 2

the lateral facet

Question 3

what kind of joint is the tibiofemoral joint

Answer 3

a bicondaylar synovial joint

Question 4

what movement do we see at the tibiofemoral joint

Answer 4

flex/ext

ER/IR

Question 5

what is a open pack position for the tibiofemoral joint

Answer 5

30 flex

Question 6

what is the closed pack position for the tibfemoral joint

Answer 6

full ext

Question 7

what is the capsular pattern for the knee

Answer 7

flex > ext

Question 8

is some valgum at the knee normal

Answer 8

yes

0-15

Question 9

with valgum is the knee going in or out

Answer 9

the knee is going in

Question 10

with varum is the knee going in or out

Answer 10

out
bowed leg

Question 11

open chain kinematics of the knee

Answer 11

same direction

tibia moving on the femur

Question 12

extension kinematics - open

Answer 12

anterior roll

anterior glide

Question 13

flexion kinematics - open

Answer 13

posterior roll

posterior glide

Question 14

closed chain kinematics

Answer 14

opposite direction

Question 15

when does the screw home mechanism occur

Answer 15

moving from flexion to ext

Question 16

what is happening in the screw home mechanism

Answer 16

10-15 deg of lateral tibia rot in non-WB (ER)

10-15 of medial femoral rots in WB

Question 17

what muscle unlocks the knee from full extention

Answer 17

popliteus

Question 18

what kind of joint is the patella-femoral joint

Answer 18

modified plane joint

Question 19

where does the patella sit

Answer 19

in the trochlear groove of the femur

Question 20

what is the function of the patella femoral joint

Answer 20

to protect the front of the knee and to provide the mechanical advantage for the quad muscle

Question 21

what direction does the patella glide with flexion

Answer 21

inf

with flexion the patella comes in more contact

Question 22

what muslce stablizes the patella on all side

Answer 22

the quad tendon

Question 23

what is the purpose of the meniscus

Answer 23

deepens the joint surface and increases the congruency and contact area

absorbs shock

distributes WB load

provides stability and lubrication

Question 24

is the MCL attached the men

Answer 24

yes the medial men

terrible tirad

Question 25

with a men tear what happens to the shock absorption

Answer 25

shock absrobtion decreases

Question 26

what part of the men is vascularized

Answer 26

the outside, there is less blood supply as we go more medial

Question 27

what makes up the hamstring

Answer 27

semitendinous, semi-membranous, and biceps femoris

Question 28

what attaches the two men anterior

Answer 28

the transverse ligament

Question 29

what direction does the men glide with flex

Answer 29

post

Question 30

what direction does the men glide with ext

Answer 30

inf

Question 31

where does the the joint capsule run from

Answer 31

the femoral condyles to the below the men

Question 32

the cruciate ligaments joint capsule

Answer 32

in the fibrous joint capsule but not in the synovial capsule

Question 33

what is the plica

Answer 33

synovial membrane that is folded over

often not a problem

Question 34

patella tendon and the patella

Answer 34

helps to maintain the alignment of the patella

Question 35

the medial collateral ligament blends with what

Answer 35

med men

Question 36

what the MCL resist

Answer 36

valgus stress

lateral tib rot
medial femoral rot

Question 37

is the LCL attached to any other structures

Answer 37

no

not to capsule or men

Question 38

what does the LCL resist

Answer 38

varus stress

lateral tib rot
medial femoral rot

Question 39

ACL attches where on the tib

Answer 39

anterior on the tib