N-Eeg & Electrophysiology 3

Front 1

Based on the Nyquist theorem, if you want to perform analog to digital conversion on a 25–Hz signal, the sampling rate should be at least

Back 1

Based on the Nyquist theorem, if you want to perform analog–to–digital conversion on a 25–Hz signal, the sampling rate should be at least 50 Hz. The Nyquist rate is twice the fastest frequency in the signal of interest.

Front 2

Silberstein (1995) proposed that global resonances are produced by resonance loops between widely separated areas (e.g., frontal–parietal and frontal–occipital regions) and produce EEG activity in the _______ range.

Back 2

Silberstein (1995) proposed that global resonances are produced by resonance loops between widely separated areas (e.g., frontal–parietal and frontal–occipital regions) and produce EEG activity in the delta–theta range. This resonance can operate spontaneously or can be driven by thalamic pacemakers.

Front 3

When an analog–to–digital converter samples an analog signal at a rate less than twice its frequency, the signal will be misrepresented as slower frequency waveforms. This problem is called

Back 3

When an analog–to–digital converter samples an analog signal at a rate less than twice its frequency, the signal will be misrepresented as slower frequency waveforms. This problem is called aliasing.

Front 4

When a clinician wants to visually inspect a signal that has undergone analog to digital conversion, the sampling rate should be at least ____ times the highest frequency of interest or else waveform morphology may be distorted.

Back 4

When a clinician wants to visually inspect a signal that has undergone analog–to–digital conversion, the sampling rate should be at least 6 times the highest frequency of interest or else waveform morphology may be distorted.

Front 5

In analog–to–digital conversion, the number of digital points per second used to represent a analog signal is referred to as the

Back 5

In analog–to–digital conversion, the number of digital points per second used to represent a analog signal is referred to as the sampling rate.

Front 6

T4 is closest to the

Back 6

T4 is closest to the right preauricular point. T refers to temporal and even numbers are located on the right half of the scalp.

Front 7

The location Fp is __% of the nasion–inion distance

Back 7

The location Fp is 10% of the nasion–inion distance.

Front 8

An increase in _____ produces hypocoupled states which facilitate small regional and local resonance loops.

Back 8

An increase in acetylcholine, dopamine, and norepinephrine produces hypocoupled states which facilitate small regional and local resonance loops.

Front 9

An increase in the neuromodulator _______ produces the hypercoupling that generates global resonances.

Back 9

An increase in the neuromodulator serotonin produces the hypercoupling that generates global resonances. This leads to sleep spindles and theta and delta activity.

Front 10

C locations (e.g., Cz) are found in _______ areas.

Back 10

C locations (e.g., Cz) are found in central areas

Front 11

_______ transforms the EEG signal into numerical values that can help clinicians examine selected EEG features.

Back 11

Quantitative EEG (QEEG) analysis transforms the EEG signal into numerical values that can help clinicians examine selected EEG features.

Front 12

The Fz, Cz, and Pz sites are each ___% of the distance between the nasion and inion starting from Fp.

Back 12

The Fz, Cz, and Pz sites are each 20% of the distance between the nasion and inion starting from Fp.

Front 13

An advanced form of topographic mapping (TM) superimposes a color or gray scale image of an EEG feature onto the cortical surface image created using

Back 13

An advanced form of topographic mapping (TM) superimposes a color or gray scale image of an EEG feature onto the cortical surface image created using Magnetic Resonance Imaging (MRI).

Front 14

Which site lies in the left parietal lobe?

Back 14

P3 lies in the left parietal lobe. P refers to parietal and odd numbers are located on the left half of the scalp.

Front 15

Silberstein (1995) proposed that local resonances are produced by resonance loops between adjacent macro columns and produce EEG activity in the _______ range.

Back 15

Silberstein (1995) proposed that local resonances are produced by resonance loops between adjacent macro columns and produce EEG activity in the gamma range (above 30 Hz). This resonance can operate spontaneously or can be driven by thalamic pacemakers.

Front 16

The nucleus reticularis of the thalamus allows thalamic pacemakers to adjust their firing frequencies by releasing _______ on relay and inhibitory interneurons.

Back 16

The nucleus reticularis of the thalamus allows thalamic pacemakers to adjust their firing frequencies by releasing GABA on relay and inhibitory interneurons.

Front 17

Those sites labeled with a z" are located"

Back 17

Those sites labeled with a z" are located along the midline"

Front 18

Silberstein (1995) proposed that regional resonances are produced by resonance loops between macro columns that are several centimeters apart and produce EEG activity in the _______ range

Back 18

Silberstein (1995) proposed that regional resonances are produced by resonance loops between macro columns that are several centimeters apart and produce EEG activity in the alpha–beta range. This resonance can operate spontaneously or can be driven by thalamic pacemakers.

Front 19

Cz is located

Back 19

Cz is located at the vertex.

Front 20

_______ constructs a graphical display of the distribution of a particular EEG feature over the scalp or cortical surface.

Back 20

Topographical mapping (TM) constructs a graphical display of the distribution of a particular EEG feature over the scalp or cortical surface.