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MSK 2 > Knee iRA/tRA > Flashcards

Knee iRA/tRA Flashcards

1
Q

What is the Q angle? What is normal Q angle?

A

angle from line of ASIS to mid patella and patella to tibial tubercle

~ 13.5 degrees (+/- 4.5 deg)

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2
Q

Q angle is _____ w/ genuverum

A

less

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3
Q

Q angle is ____ w/ genuvalgus

A

more

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4
Q

What part of the patella contacts femoral condyle in full flexion?

A

medial border or “odd” facet

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5
Q

What blends with PCL posteriorly?

A

knee joint capsule

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6
Q

When is MCL taut and when is it least taut? What is a good position for mobilizations?

A

taut - extension

least taut - 30 deg of flexion - good for mobilizations

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7
Q

What is the function of the MCL?

A
  • checks/limits genu valgus

- prevents lateral rotation (w/ knee extended)

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8
Q

When is the LCL least taut?

A

30 deg of flexion

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9
Q

What is the function of the LCL?

A
  • checks/limits varus force
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10
Q

T/F - The ACL is more vascularized in the distal portion vs the proximal portion

A

false - proximal > distal portion for vascularization

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11
Q

What is the function of the ACL in all planes?

A

Sagittal - stabilize knee and resist anterior tibial torsion

Frontal - varus and valgus angulation (minimal)

Horizontal - tibial rotation

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12
Q

What is the function of the PCL?

A

pulls condyles posteriorly during extension

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13
Q

What muscles additionally flex the knee with stationary foot?

A
  • gastroc and plantaris
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14
Q

What are the medial rotators of the knee?

A
  • semimembranosus
  • semitendinosus
  • popliteus
  • gracilis
  • sartorius
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15
Q

What are the lateral rotators of the knee?

A

biceps femoris

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16
Q

A/PROM of knee flexion

A

AROM - 135

PROM - 160

17
Q

Resting and closed packed position of the knee

A

resting - 30 deg flexion

closed - full extension

18
Q

T/F: Hoffa’s fat pad is not a pain generator

A

false - it is highly vascularized and innervated so it is a pain generator

19
Q

What is Hoffa’s fat pads function?

A

space decreases as knee flexes due to increase in pressure

reservoir for reparative cells

20
Q

A/PROM knee IR and ER

A

60-70 total

21
Q

What part of patella contacts trochlea with an extended knee?

A

inferior patella

22
Q

What part of patella contacts trochlea with 30 deg flexion?

A

mid-patella contacts trochlea

23
Q

What part of patella contacts trochlea with full flexion

A

superior and superiolateral patella contacts trochlea

24
Q

spinal roots of knee extensors

A

L2-L4

25
Q

spinal roots of knee flexors

A

L5-S2

MSK 2 (8 decks)

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