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EEG > Patterns: Descriptive Terminology > Flashcards

Patterns: Descriptive Terminology Flashcards

1
Q

the number of times a wave occurs in one second

A

Frequency

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2
Q

frequency is expressed in…

A

Hz

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3
Q

Beta

A

> 13Hz

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4
Q

Alpha

A

8-13Hz

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5
Q

Theta

A

4-7Hz

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6
Q

Delta

A

<4Hz

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7
Q

activity with waves of same frequency or constant duration

A

rhythmic

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8
Q

activity of differing frequencies

A

arrhythmic

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9
Q

the length of time the wave lasts

A

duration

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10
Q

what is duration calculated in?

A

milliseconds or seconds

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11
Q

The faster the frequency the ___

A

shorter the duration

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12
Q

The slower the frequency the ___

A

longer the duration

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13
Q

the strength of the electrical activity in the brain

A

Voltage

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14
Q

what is voltage expressed in?

A

microvolts (uV)

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15
Q

amplitude reduction

A

attenuation

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16
Q

abrupt beginning and abrupt ending of the activity distant from the background in frequency, morphology, and amplitude

A

paroxysmal

17
Q

the shape of waves or waveforms

A

morphology

18
Q

activity that comes and goes

A

transient

19
Q

20-70 msec
14-50 Hz

A

spike

20
Q

70-200 msec
5-14 Hz

A

Sharp

21
Q

having 2 components

A

Biphasic wave

22
Q

having 3 components

A

Triphasic wave

23
Q

waves sharply contoured standing out from the background having the same shape characteristics of wave indicative of epilepsy

A

Epileptiform

24
Q

activity of one frequency or waves similar in duration

A

monomorphic

25
Q

activity of more than one frequency

A

polymorphic

26
Q

two or more waves different frequencies that stand out from the background

A

complex

27
Q

activity restricted to one or a few electrodes

A

focal

28
Q

activity predominantly on one side of the head

A

lateralized

29
Q

activity occurs at the same time all over the head

A

generalized

30
Q

activity that is similar in frequency, voltage, and morphology from both hemispheres

A

symmetry

31
Q

activity that is similar in frequency, voltage, and morphology from homologous head regions

A

synchrony

32
Q

approximately the same interval between discharges

A

periodic

33
Q

reaction to stimulation

A

reactivity

EEG (9 decks)

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