Deck 11: Principles of Electrical Stimulation

Question 1

When examining the attributes of the pulse,which of the following will lead to an increase in the total charge of the pulse? Select all that apply.

A) Increase amplitude
B) Increase pulse duration
C) Decrease pulse duration
D) Increase interpulse interval
E) Increase cycle duration

Answer 1

A,B

Question 2

In a parallel circuit,the ________is varied,but the ________remains constant?

A) amperage; voltage
B) voltage; wattage
C) wattage; amperage
D) voltage; amperage

Answer 2

A

Question 3

What unit is used to express the relationship between voltage and amperage?

A) Wattage
B) Mhos
C) Inductance
D) Coulombs

Answer 3

A

Question 4

What type of current does high-voltage pulsed stimulation use?

A) Monophasic
B) Biphasic
C) Pulsed
D) Asymmetrical

Question 5

What type of electrical current is identified by the fact that electron flow is interrupted by discrete periods of no electron flow?

A) Direct current
B) Alternating current
C) Pulsed current
D) Polyphasic current

Question 6

What parameter of interferential current identified as the distance from the peak on the positive side of the baseline to the peak on the negative side?

A) Peak-to-peak amplitude
B) Peak value
C) Cycle duration
D) Peak frequency

Question 7

What two properties are collectively known as impedance? Select all that apply.

A) Inductance
B) Capacitance
C) Resistance
D) Ohm's law
E) Wattage

Question 8

What is the unit of potential difference and represents the amount of work required to move one coulomb of charge?

A) Volt
B) Milliampere
C) Ampere
D) Current

Question 9

Ohm's law describes the relationship between what characteristics of electrical currents? Select all that apply.

A) Amperage
B) Voltage
C) Resistance
D) Wattage
E) Frequency

Question 10

Due to the lower charge per phase,which of the following waveforms tends to be the most comfortable for patients?

A) Symmetrical biphasic
B) Asymmetrical biphasic
C) Unbalanced symmetrical biphasic
D) Unbalanced asymmetrical biphasic

Question 11

An electrical stimulation unit uses what carrier frequencies for their heating effects? Select all that apply.

A) 500 cycles per second
B) 10,000 cycles per second
C) 100,000 cycles per second
D) 200,000 cycles per second
E) 1000 cycles per second

Question 12

The physiological effects of electrical stimulation are related to what characteristic?

A) Current density
B) Average current
C) Duty cycle
D) Ohm's law

Question 13

What property of electrical current identifies the maximum distance that the pulse rises above or below the isoelectric point?

A) Amplitude
B) Phase duration
C) Pulse width
D) Pulse charge

Question 14

Consider the principles of electrical stimulation and select the most accurate statement about electricity.

A) Electricity is a force created by the imbalance in the number of positively charged electrons.
B) Electrical current will flow from low electron concentration to an area of high electron concentration.
C) The electrical current will always take the path of most resistance.
D) The electrical current will flow from the cathode to the anode.

Question 15

What type of current do interferential stimulators use?

A) Direct current
B) Alternating current
C) Pulsed current
D) Polyphasic current

Question 16

What biological tissue is the primary resistor to therapeutic electrical flow?

A) Skin
B) Muscle
C) Adipose
D) Fascia

Question 17

When using an alternating current,how many times would a current of 100 Hz change its direction of flow in two seconds?

A) 50
B) 100
C) 150
D) 200

Question 18

When using a monophasic current,what parameters are synonymous and refer to the same aspect of the current? Select all that apply.

A) Pulse
B) Waveform
C) Phase
D) Amplitude
E) Pulse duration

Question 19

What is used to measure a material's resistance to the movement of electrons?

A) Ampere
B) Henry
C) Ohm
D) Mho

Question 20

When examining the pulse characteristics,what is the most important factor when determining what type of tissue will be stimulated?

A) Phase duration
B) Interpulse interval
C) Intrapulse interval
D) Pulse duration