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NEURAL INHIBITION MODEL OF THE P(300) COMPONENT OF THE AVERAGED EVOKED POTENTIAL

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Date Issued:
1980
Summary:
Visual and auditory evoked potentials were studied in a selective attention paradigm similar to that of Posner and Boies (1971) wherein a visual letter-matching task was interrupted by auditory probes on selected trials. A neural inhibition model of the P300 component was proposed which generated the hypothesis that the P300 component in response to auditory probes would be greatest in amplitude to probes which occurred between the two to-be-remembered test letters and smaller in amplitude to probes which occurred before the presentation of the first test letter. General support for the neural inhibition model was found, however, systematically shifting prestimulus baselines were also observed within these time intervals thereby raising the possibility that the differences in P300 amplitudes were due to nonspecific changes in the general arousal level of the subject. It was also found that instruction-induced differences in response speed affected the amplitude of the evoked potential components in a way which could most parsimoniously be attributed to shifts in general arousal.
Title: A NEURAL INHIBITION MODEL OF THE P(300) COMPONENT OF THE AVERAGED EVOKED POTENTIAL.
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Name(s): WILLIAMS, CATHY SUZANNE
Florida Atlantic University, Degree Grantor
Type of Resource: text
Genre: Electronic Thesis Or Dissertation
Issuance: monographic
Date Issued: 1980
Publisher: Florida Atlantic University
Place of Publication: Boca Raton, Fla.
Physical Form: application/pdf
Extent: 158 p.
Language(s): English
Summary: Visual and auditory evoked potentials were studied in a selective attention paradigm similar to that of Posner and Boies (1971) wherein a visual letter-matching task was interrupted by auditory probes on selected trials. A neural inhibition model of the P300 component was proposed which generated the hypothesis that the P300 component in response to auditory probes would be greatest in amplitude to probes which occurred between the two to-be-remembered test letters and smaller in amplitude to probes which occurred before the presentation of the first test letter. General support for the neural inhibition model was found, however, systematically shifting prestimulus baselines were also observed within these time intervals thereby raising the possibility that the differences in P300 amplitudes were due to nonspecific changes in the general arousal level of the subject. It was also found that instruction-induced differences in response speed affected the amplitude of the evoked potential components in a way which could most parsimoniously be attributed to shifts in general arousal.
Identifier: 14032 (digitool), FADT14032 (IID), fau:10849 (fedora)
Note(s): Thesis (M.A.)--Florida Atlantic University, 1980.
Subject(s): Evoked potentials (Electrophysiology)
Electroencephalography
Held by: Florida Atlantic University Libraries
Persistent Link to This Record: http://purl.flvc.org/fcla/dt/14032
Sublocation: Digital Library
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Host Institution: FAU
Is Part of Series: Florida Atlantic University Digital Library Collections.