Frequency Verbatim

Question 1

Generalized

Answer 1

Present in all areas (regions)

Question 2

Diffuse

Answer 2

Occurring over large areas of one or both sides of the head

Question 3

Lateralized

Answer 3

Coming from one side

Question 4

Bilateral

Answer 4

Coming from both sides of the head

Question 5

Focal

Answer 5

Restricted to one region

Question 6

Synchronous

Answer 6

Simultaneous appearing in TIME of activity over homologous head regions

Question 7

Frequency

Answer 7

How often a changing signal repeats itself

Question 8

Rhythmic

Answer 8

EEG activity consisting of waves of approximate constant frequency

Question 9

Arrhythmic

Answer 9

No stable rhythms are present

Question 10

Amplitude (Voltage)

Answer 10

Amplitude- Height of a wave measured in mm

Voltage- Electrical power of the brain measured in micro volts

Question 11

Attenuation

Answer 11

Reduction of amplitude resulting from decreased voltage

Question 12

Hypersynchrony

Answer 12

Unexpectedly high amplitude and regularity of rhythmic activity

Question 13

Paroxysmal

Answer 13

Activity that emerges from the background with rapid onset, reaches quite high voltage and ends with an abrupt return to lower voltage activity

Question 14

Symmetry

Answer 14

Approximately equal amplitude over homologous areas on opposite sides of the head

Question 15

Morphology

Answer 15

The shape of the waveform

Question 16

Monomorphic

Answer 16

Distinct EEG activity composed of one dominant frequency

Question 17

Polymorphic

Answer 17

EEG activity composed of multiple frequencies that combine to form a complex waveform

Question 18

Sinusoidal

Answer 18

EEG activity resembles sine waves

Question 19

Transient

Answer 19

Isolated wave or pattern that is distinctly different from the background

Question 20

Spikes

Answer 20

A potential with les than 70 milliseconds duration

Question 21

Polyspikes

Answer 21

Sequence of two or more spikes

Question 22

Sharp Waves

Answer 22

A potential with more than 70 milliseconds duration, but less than 200 seconds duration

Question 23

Complex

Answer 23

A sequence of two or more waves with a distinct form or pattern different from the background activity

Question 24

Biphasic (Diphasic)

Answer 24

A wave or complex having two distinct components; one surface positive and the other negative

Question 25

Triphasic

Answer 25

Wave or complex having three distinct components: first positive, second negative and third positive, or, first negative, second positive, and third negative

Question 26

Epileptiform

Answer 26

“Interpretive Term”; distinctive waves or complexes that resemble those recorded from patients with epileptic disorders

Question 27

Quantity

Answer 27

Amounts of a particular type of EEG activity with respect to the percent time present and/or to voltage

Question 28

Continuous

Answer 28

Occurring without interruption

Question 29

Discontinuous

Answer 29

Appearing from time to time

Question 30

Regular

Answer 30

Consistent form

Question 31

Irregular

Answer 31

Inconsistent form

Question 32

Periodicity

Answer 32

Refers to occurring regularly

Question 33

Periodic

Answer 33

EEG waves or complexes are occurring at an approximately regular rate

Question 34

Aperiodic

Answer 34

EEG waves or complexes occurring at an irregular rate

Question 35

Functional Properties

Answer 35

Variations that occur in relation to changes in age, to shifts in level of consciousness, and during the alert state in relation to mental alerting

Question 36

Location

Answer 36

Refers to the scalp distribution of the EEG rhythms or patterns

Question 37

Slow Waves

Answer 37

Potential with more than 200 ms in duration