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Passive > Part 2 > Flashcards

Part 2 Flashcards

1
Q

Monophonic current uses what specific type of current?

A

DIRECT

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2
Q

What is another name for monophasic current ?

A

Galvanic

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3
Q

Current flow in one direction is a characteristic of what?

A

Monophasic current

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4
Q

Biphasic current uses what specific type of current?

A

Alternating (AC)

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5
Q

What type of currents flow of electrons changes direction regularly?

A

Biphasic

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6
Q

What is the time it takes current to leave the isoelectric line to when it returns to this line called?

A

Phase duration

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7
Q

What is the phase duration for monophasic ?

A

Phase duration and pulse duration are the same

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8
Q

What is the phase duration in biphasic ?

A

two phase durations for each pulse

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9
Q

High peak current is associated with what?

A

Greater depth of penetration (leads to more muscle recruitment)

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10
Q

Do large diameter nerves have a high or low capacitance?

A

Low (reach threshold quickly)

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11
Q

Do tissues respond to phase duration or pulse duration?

A

Phase duration

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12
Q

The intensity or magnitude of the current is know as?

A

Amplitude

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13
Q

What is the maximum amplitude of the current REGARDLESS of duration?

A

Peak current

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14
Q

Amplitude must be high enough to….?

A

Reach threshold of muscle or nerve

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15
Q

Amplitude is high enough to reach threshold of a nerve or muscle what responds first ?

A

Sensory

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16
Q

What two things does average current take into consideration?

A

Peak amplitude and phase duration

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17
Q

How do you alter the phase charge?

A

Amplitude and phase duration

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18
Q

What fibers are stimulated first A-beta or A-alpha?

A

A-beta

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19
Q

What fibers must be initiated for a muscle to contract?

A

A-Alpha (motor fiber)

20
Q

A burning or needling sensation during therapy signals what?

A

You have exceeded the a delta fiber capacitance

21
Q

The time required to depolarize a never fiber when the peak current is twice rheobase is known as what ?

A

Chronaxie

22
Q

When amplitude is _______ rheobase and the phase duration is _____ ________ than chronaxie the rudest will be greatest comfort to the patient/

A

Twice, slightly greater

23
Q

What is the rate limiting factor of the number of impulse that can be generated by a nerve known as?

A

Absolute refactor period

24
Q

Stimulation at high frequency near refractory period of the sensory never causes inhibition known as?

A

Wedenskis inhibition

25
Q

What leads to summation?

A

Higher frequency

26
Q

What is the hz in wedenskis inhibition?

A

> 1000

27
Q

What is the hz for low frequency generators and what does it do?

A

1000, Produce action potentials

28
Q

What are medium frequency generators IN hz?

A

1000-100,000

29
Q

Interferential current uses what hz range?

A

3,000-5000

30
Q

Russian stimulation uses a carrier frequency of what?

A

2,500

31
Q

Intrinsic duty cycle of 10ms on and 50 ms off creates what?

A

A burst frequency of 50hz

32
Q

What is the hz range for high frequency ?

A

<100,000

33
Q

High frequency generators are used for what/

A

Thermal (heat)

34
Q

Diathermy uses high frequency and creates what?

A

Minimal sensory deficits

35
Q

Unequal electrode size will concentrate the current in which electrode?

A

The smaller one

36
Q

What would you do to concentrate the current in superficial tissues?

A

You’d places the electrodes close together

37
Q

Monoploar uses how may electrodes?

A

2 unequal sized electrodes

38
Q

Does monopolar use AC or DC current?

A

Either one

39
Q

If resistance increases, what will n emended to get the same current flow?

A

More voltage

40
Q

Is monopolar active at the target site?

A

Yes

Dispersive away from target site

41
Q

What is the most common electrode configuration for TENS?

A

Bipolar

42
Q

What do the electrodes look like in bipolar?

A

2 equal sized electrodes over the treatment site

43
Q

What kind of configuration is seen with interferential current?

A

Quadripolar

44
Q

What is the configuration for quadripolar?

A

2 separate medium frequency currents with electrodes placed at cross currents

45
Q

What are things associated with interferential current?

A

Also called IF IFC, true interferential, pre modulated-vector scar stereodynamic

Passive (7 decks)

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