Definitions

Question 1

Electrical current

Answer 1

The flow of electrons from an electron source (through wave)

Question 2

Resistor

Answer 2

A material opposes current flow

Question 3

Capacitor

Answer 3

A device that stores electrical energy

Question 4

Impedence

Answer 4

Opposition of biological tissues to the flow of electrical current`

Question 5

Direct current

Answer 5

Flow of current in one direction (negative or positive)

Question 6

Alternating current

Answer 6

Flow of current first in one direction then in the other (bidirectional)

Question 7

Monophasic

Answer 7

Syn. with direct current

Question 8

Biphasic

Answer 8

Syn. with alternating current

Question 9

Phase

Answer 9

Current flow in one direction

Question 10

Phase duration

Answer 10

Time period from beginning to end of one phase (leave isoelectric line until it returns)

Question 11

Interphase duration

Answer 11

Time between phases

Question 12

Phase rise time

Answer 12

Time from isoelectric line until maximum amplitude

Question 13

Pulse duration

Answer 13

Equal to phase duration for DC and 2X phase duration fro AC

Question 14

Burst

Answer 14

Series of successive pulses or cycles over a period of time

Question 15

Burst duration

Answer 15

Time between beginning of 1st and end of last cycle or pulse

Question 16

Interburst duration

Answer 16

Time between two successive bursts

Question 17

Beat

Answer 17

The resulting current waveform when 2 or more sinusoidal waves intersect with each other

Question 18

Frequency

Answer 18

Number of times per second that a pulse, cycle, burst or beat occurs

Question 19

Amplitude

Answer 19

Magnitude of current relative to the isoelectric line measured in amperes. Usually in micro to miliamperes. Can be peak, peak-to-peak, average or root mean square

Question 20

Train

Answer 20

Continuous series of pulses, cycles, bursts, or beats ove time

Question 21

Duty cycle

Answer 21

Ratio of on to off time expressed as a percentage

Question 22

Ramp up

Answer 22

Time period where current amplitude is increasing from zero to maximum

Question 23

Ramp down

Answer 23

Time period where current amplitude is decreasing from maximum to zero

Question 24

Modulation

Answer 24

Changes in amplitude, pulse duration, pulse frequency, or a combination of these to prevent nerve accommodation to stimulation

Question 25

Phase decay time

Answer 25

Time from maximum amplitude until back at isoelectric point