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Size matters

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Size matters : effects of stimulus size, duration and eccentricity on the visual gamma-band response. / Busch, Niko A; Debener, Stefan; Kranczioch, Cornelia; Engel, Andreas K; Herrmann, Christoph S.

in: CLIN NEUROPHYSIOL, Jahrgang 115, Nr. 8, 01.08.2004, S. 1810-20.

Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung

Harvard

Busch, NA, Debener, S, Kranczioch, C, Engel, AK & Herrmann, CS 2004, 'Size matters: effects of stimulus size, duration and eccentricity on the visual gamma-band response', CLIN NEUROPHYSIOL, Jg. 115, Nr. 8, S. 1810-20. https://doi.org/10.1016/j.clinph.2004.03.015

APA

Busch, N. A., Debener, S., Kranczioch, C., Engel, A. K., & Herrmann, C. S. (2004). Size matters: effects of stimulus size, duration and eccentricity on the visual gamma-band response. CLIN NEUROPHYSIOL, 115(8), 1810-20. https://doi.org/10.1016/j.clinph.2004.03.015

Vancouver

Busch NA, Debener S, Kranczioch C, Engel AK, Herrmann CS. Size matters: effects of stimulus size, duration and eccentricity on the visual gamma-band response. CLIN NEUROPHYSIOL. 2004 Aug 1;115(8):1810-20. https://doi.org/10.1016/j.clinph.2004.03.015

Bibtex

@article{b27efdd180744796879aa0c650ef1b6d,
title = "Size matters: effects of stimulus size, duration and eccentricity on the visual gamma-band response",
abstract = "OBJECTIVE: The effects of stimulus size, duration and eccentricity on the visual gamma-band response (GBR) in human EEG were investigated and compared to visual evoked potentials (VEPs) in order to differentiate in future (and past) experiments whether changes in GBRs are due to stimulus-related (exogenous) or cognitive effects.METHODS: EEG was recorded from 23 subjects while they performed a simple choice reaction time task requiring discrimination of squares and circles. In separate blocks stimulus size, duration, and eccentricity were manipulated. EEG was recorded from 64 electrodes. A wavelet transform based on Morlet wavelets was employed for the analysis of gamma-band activity.RESULTS: Amplitude of the GBR was diminished for small and peripheral stimuli. With short stimulus durations ON and OFF responses of the GBR merged into one peak. In comparison, VEP amplitudes were less susceptible to stimulus features. In contrast to VEP latencies, however, GBR latency did not show a lateralization for eccentric stimuli.CONCLUSIONS: In addition to previous experiments which have shown a modulation of the GBR by various cognitive processes, the present results demonstrate the susceptibility of the GBR in human EEG to exogenous factors, as numerous intracortical recordings in non-human primates have shown before. The results suggest that the human GBR resides in early visual areas.SIGNIFICANCE: The demonstration of the susceptibility of the GBR to stimulus properties implies that studies aimed at exploring the involvement of the GBR in information processing have to be designed carefully. It also constrains the localization of the human GBR.",
keywords = "Adult, Analysis of Variance, Electric Stimulation, Electroencephalography, Evoked Potentials, Visual, Female, Humans, Male, Photic Stimulation, Reaction Time, Time Factors",
author = "Busch, {Niko A} and Stefan Debener and Cornelia Kranczioch and Engel, {Andreas K} and Herrmann, {Christoph S}",
year = "2004",
month = aug,
day = "1",
doi = "10.1016/j.clinph.2004.03.015",
language = "English",
volume = "115",
pages = "1810--20",
journal = "CLIN NEUROPHYSIOL",
issn = "1388-2457",
publisher = "Elsevier",
number = "8",

}

RIS

TY - JOUR

T1 - Size matters

T2 - effects of stimulus size, duration and eccentricity on the visual gamma-band response

AU - Busch, Niko A

AU - Debener, Stefan

AU - Kranczioch, Cornelia

AU - Engel, Andreas K

AU - Herrmann, Christoph S

PY - 2004/8/1

Y1 - 2004/8/1

N2 - OBJECTIVE: The effects of stimulus size, duration and eccentricity on the visual gamma-band response (GBR) in human EEG were investigated and compared to visual evoked potentials (VEPs) in order to differentiate in future (and past) experiments whether changes in GBRs are due to stimulus-related (exogenous) or cognitive effects.METHODS: EEG was recorded from 23 subjects while they performed a simple choice reaction time task requiring discrimination of squares and circles. In separate blocks stimulus size, duration, and eccentricity were manipulated. EEG was recorded from 64 electrodes. A wavelet transform based on Morlet wavelets was employed for the analysis of gamma-band activity.RESULTS: Amplitude of the GBR was diminished for small and peripheral stimuli. With short stimulus durations ON and OFF responses of the GBR merged into one peak. In comparison, VEP amplitudes were less susceptible to stimulus features. In contrast to VEP latencies, however, GBR latency did not show a lateralization for eccentric stimuli.CONCLUSIONS: In addition to previous experiments which have shown a modulation of the GBR by various cognitive processes, the present results demonstrate the susceptibility of the GBR in human EEG to exogenous factors, as numerous intracortical recordings in non-human primates have shown before. The results suggest that the human GBR resides in early visual areas.SIGNIFICANCE: The demonstration of the susceptibility of the GBR to stimulus properties implies that studies aimed at exploring the involvement of the GBR in information processing have to be designed carefully. It also constrains the localization of the human GBR.

AB - OBJECTIVE: The effects of stimulus size, duration and eccentricity on the visual gamma-band response (GBR) in human EEG were investigated and compared to visual evoked potentials (VEPs) in order to differentiate in future (and past) experiments whether changes in GBRs are due to stimulus-related (exogenous) or cognitive effects.METHODS: EEG was recorded from 23 subjects while they performed a simple choice reaction time task requiring discrimination of squares and circles. In separate blocks stimulus size, duration, and eccentricity were manipulated. EEG was recorded from 64 electrodes. A wavelet transform based on Morlet wavelets was employed for the analysis of gamma-band activity.RESULTS: Amplitude of the GBR was diminished for small and peripheral stimuli. With short stimulus durations ON and OFF responses of the GBR merged into one peak. In comparison, VEP amplitudes were less susceptible to stimulus features. In contrast to VEP latencies, however, GBR latency did not show a lateralization for eccentric stimuli.CONCLUSIONS: In addition to previous experiments which have shown a modulation of the GBR by various cognitive processes, the present results demonstrate the susceptibility of the GBR in human EEG to exogenous factors, as numerous intracortical recordings in non-human primates have shown before. The results suggest that the human GBR resides in early visual areas.SIGNIFICANCE: The demonstration of the susceptibility of the GBR to stimulus properties implies that studies aimed at exploring the involvement of the GBR in information processing have to be designed carefully. It also constrains the localization of the human GBR.

KW - Adult

KW - Analysis of Variance

KW - Electric Stimulation

KW - Electroencephalography

KW - Evoked Potentials, Visual

KW - Female

KW - Humans

KW - Male

KW - Photic Stimulation

KW - Reaction Time

KW - Time Factors

U2 - 10.1016/j.clinph.2004.03.015

DO - 10.1016/j.clinph.2004.03.015

M3 - SCORING: Journal article

C2 - 15261860

VL - 115

SP - 1810

EP - 1820

JO - CLIN NEUROPHYSIOL

JF - CLIN NEUROPHYSIOL

SN - 1388-2457

IS - 8

ER -