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Kines Final > Knee > Flashcards

Knee Flashcards

1
Q

What is the main function of the knee?

A

Stability, allow for mobility in clearing during gait

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2
Q

Function of the fibula

A

lateral stabilizer– indirect attachment for LCL, but not true contributor to knee joint

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3
Q

Which is larger, lateral or medial plateau?

A

Medial

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4
Q

Patella’s base is _______ and apex is _______-

A

base superior

apex inferior

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5
Q

Anterior surface is ________, posterior is ______________

A 
ant = convex in all directions
post = both convex and concave. covered with cartilage.
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6
Q

PRIMARY function of patellla

A

increase angle of application (MA of quadriceps)

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7
Q

SECONDARY function of patella

A

protect quad tendon from excessive friction

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8
Q

Genu Valgum excessive angle

A

Greater than 170

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9
Q

Genu Varum excessive angle

A

Greater than 180

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10
Q

Genu valgum compresses the knee ______

Genu varum compresses the knee _______

A

valgum = laterally

varum = medially

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11
Q

Most relaxed position of the TF capsule

A

Slight flexion (15 to 30 degrees)

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12
Q

Blood supply of menisci is greatest where?

A

Periphery

red-red zone –> red-white zone–>white-white zone

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13
Q

Medial meniscus shape vs lateral meniscus shape

A 
medial = semicircular
lateral = circular
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14
Q

Primary functions of menisci

A

reduce compressive forces, stabilize joint during motion

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15
Q

In what knee position can internal or external knee rotation occur?

A

Slightly flexed

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16
Q

Flexion/Extension AOR

A

Medial-Lateral

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17
Q

Closed Chain Arthrokinematics of Knee EXTENSION

A

Prox on distal = femur on tibia = convex on concave = femoral condyles roll anteriorly and glide posteriorly

18
Q

Open chain arthokinematic of knee EXTENSION

A

Distal on proximal = tibia on femur = concave on convex = tibia rolls and glides anteriorly

19
Q

Arthrokinematics of screw home mechanism- open chain

A

tibia on femur = popliteus initiates tibial IR

20
Q

Arthrokinematics of screw home mech - closed chain

A

Femur on tibia = popliteus initiates femoral ER

21
Q

Open chain AK of knee flexion

A

tibia rolls and glides posteriorly

22
Q

Closed chain AK of knee flexion

A

femoral condyles roll posteriorly and glide anteriorly

23
Q

Is MCL vascularized?

A

Yes

24
Q

MCL protects more when it is _______

A

Extended

25
Q

MCL and LCL resist more when they are in slight

A

flexion (since they’re not as taught)

26
Q

Primary function of ACL

A

anterior displacement of the tibia on femoral condyles

27
Q

Fibers of ACL taught with knee how?

A

Close to full extension

28
Q

How is ACL most commonly torn?

A

Knee slightly flexed and tibia is rotated to either direction
(forceful quad contraction pulls tibia anteriorly whichs trains ACL)

29
Q

PCL is taught in knee

A

flexion

30
Q

Knee Flexed 135– where is pt of max contact between patella and femur?

A

Superior pole of patella

31
Q

Knee Flexed 90 – where is pt of max contact between patella and femur?

A

Middle of patella

32
Q

Knee Flexed 20– where is point of max contact between patella and femur?

A

Inferior pole of patella

33
Q

As knee extends…max contact between patella and femur…

A

moves from superior pole to inferior pole of patella

34
Q

Where is Q angle measured?

A

ASIS to mid-patella, tibial tuberosity to mid-patella

35
Q

Normal Q angle for women and men

A

15 women, 11 men (>15 is abnormal)… used to assess pull on patella

36
Q

In sitting– external torque of flexed knee then extended knee

A

flexed knee: 0

extended knee: near 100

37
Q

In standing (femur on tib) –external torque of flexed knee then extended knee

A

100 to 0 (in extension you hang on your ligaments)

38
Q

Maximal torque of hamstrings

A

about 30 degrees (near full knee extension)

39
Q

Pes anserine function in knee

A

Provide medial stability, internally rotates tibia

40
Q

Popliteus function in knee

A

IR, flexor – unlocks the knee

Kines Final (11 decks)

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