Psychophysiological Methods In Research And Practice at Freie Universität Berlin | Flashcards & Summaries

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In the EEG frequency spectrum, one often sees a strong deflection at exactly 50 Hz. What
is this due to?

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TESTE DEIN WISSEN

Gamma oscillations in the brain

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TESTE DEIN WISSEN

The C1 visual component is an [exogenous/endogenous] EKP component that occurs
[before/after] the P300 component

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exogenous, before the P300

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Which statement regarding the amplitude of the EEG signal recorded by electrodes over
the head is true?

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It is much smaller than either the ECG or EMG signals described above.


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Impedance is specified in units of....

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Microvolt

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A subject presses a key with the left hand or foot. At which EEG electrode would you
expect to have the strongest lateralized readiness potential?

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Hand response: Oz, foot response: Fz.

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TESTE DEIN WISSEN

.Measurement methodology: the presentation of a visual stimulus triggers a P1 component
in the EEG. How would you classify this biosignal?

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TESTE DEIN WISSEN

evoked and tonic

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Measurement methodology: An EEG recording was low-pass analog filtered at 50 Hz
before analog-to-digital conversion (sampling rate: 200 Hz). Can apparent frequencies
(aliasing) still occur in the signal? And what should be done?

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TESTE DEIN WISSEN

Yes. Therefore, the digitized signal must still be low-pass filtered at 100 Hz.

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Which one is not EEG artifacts

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Ocular activity

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Which ERP components fit the description in the following order: Automatic detection of
stimulus deviance or novelty, Task-dependent categorization, face processing; Initial sensory
repones

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TESTE DEIN WISSEN

P2; P300; P1; N170

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Which waves fall into the 12-38 Hz that dominate when we are awake, alert and engaged;
which waves dominates when we are in a period of deep sleep; which waves dominates when
we have completed a task and sit down to rest; which waves are strong in the drowsy state
before sleep in infants, adolescents and adults.

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TESTE DEIN WISSEN

Delta, alpha, theta, Beta

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Measurement methodology: Which sequence in the acquisition of biosignals is logical?

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TESTE DEIN WISSEN

1. transducer, 2. sensor, 3. A/D converter, 4. digital filtering

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Which description is TRUE between fixation and saccades?

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Fixation has a typical mean duration of about 20 to 40 ms.

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Q:

In the EEG frequency spectrum, one often sees a strong deflection at exactly 50 Hz. What
is this due to?

A:

Gamma oscillations in the brain

Q:

The C1 visual component is an [exogenous/endogenous] EKP component that occurs
[before/after] the P300 component

A:

exogenous, before the P300

Q:

Which statement regarding the amplitude of the EEG signal recorded by electrodes over
the head is true?

A:

It is much smaller than either the ECG or EMG signals described above.


Q:

Impedance is specified in units of....

A:

Microvolt

Q:

A subject presses a key with the left hand or foot. At which EEG electrode would you
expect to have the strongest lateralized readiness potential?

A:

Hand response: Oz, foot response: Fz.

Mehr Karteikarten anzeigen
Q:

.Measurement methodology: the presentation of a visual stimulus triggers a P1 component
in the EEG. How would you classify this biosignal?

A:

evoked and tonic

Q:

Measurement methodology: An EEG recording was low-pass analog filtered at 50 Hz
before analog-to-digital conversion (sampling rate: 200 Hz). Can apparent frequencies
(aliasing) still occur in the signal? And what should be done?

A:

Yes. Therefore, the digitized signal must still be low-pass filtered at 100 Hz.

Q:

Which one is not EEG artifacts

A:

Ocular activity

Q:

Which ERP components fit the description in the following order: Automatic detection of
stimulus deviance or novelty, Task-dependent categorization, face processing; Initial sensory
repones

A:

P2; P300; P1; N170

Q:

Which waves fall into the 12-38 Hz that dominate when we are awake, alert and engaged;
which waves dominates when we are in a period of deep sleep; which waves dominates when
we have completed a task and sit down to rest; which waves are strong in the drowsy state
before sleep in infants, adolescents and adults.

A:

Delta, alpha, theta, Beta

Q:

Measurement methodology: Which sequence in the acquisition of biosignals is logical?

A:

1. transducer, 2. sensor, 3. A/D converter, 4. digital filtering

Q:

Which description is TRUE between fixation and saccades?

A:

Fixation has a typical mean duration of about 20 to 40 ms.

Psychophysiological Methods in Research and Practice

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