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Article: Auditory stimulus intensity effects on components of the late positive complex

TitleAuditory stimulus intensity effects on components of the late positive complex
Authors
Issue Date1982
PublisherElsevier Ireland Ltd. The Journal's web site is located at http://www.elsevier.com/locate/clinph
Citation
Electroencephalography And Clinical Neurophysiology, 1982, v. 54 n. 2, p. 132-146 How to Cite?
AbstractThree groups of subjects were tested in experiments in which the late positive complex (LPC) was elicited by 50 msec white noise pips of various intensities. Principal Components Analysis was used to decompose event-related potential wave forms. In the first experiment noise pips were presented every 4 sec at intensities ranging from 55 to 115 dB SPL under 3 attention conditions: counting the stimuli, ignoring them, or performing a visual search task. Higher intensities produced larger blink, P190, P280 and P340 components. Attention affected blink, P190, P340 and slow wave (SW) components. In the second experiment stimulus intensity ranged in one run between 80 and 110 dB, the probability of the 110 dB stimulus being 0.25; in the other run, stimuli were always 110 dB. P310 was sensitive to both intensity and probability, while SW was affected only by probability. In the third experiment the habituation of the LPC and skin conductance response (SCR) to 115 dB noise pips presented at random intervals between 10 and 90 sec was examined over 62 trials. The amplitude of blink, N95 and P265 declined over trials, and SCR increased after an unexpected verbal message. These results show that components of the LPC with latencies around 30 msec have both exogenous and endogenous properties. Only SW was completely independent of stimulus intensity in these experiments.
Persistent Identifierhttp://hdl.handle.net/10722/168904
ISSN
2000 Impact Factor: 3.327
2001 SCImago Journal Rankings: 1.168
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorRoth, WTen_US
dc.contributor.authorBlowers, GHen_US
dc.contributor.authorDoyle, CMen_US
dc.contributor.authorKopell, BSen_US
dc.date.accessioned2012-10-08T03:39:31Z-
dc.date.available2012-10-08T03:39:31Z-
dc.date.issued1982en_US
dc.identifier.citationElectroencephalography And Clinical Neurophysiology, 1982, v. 54 n. 2, p. 132-146en_US
dc.identifier.issn0013-4694en_US
dc.identifier.urihttp://hdl.handle.net/10722/168904-
dc.description.abstractThree groups of subjects were tested in experiments in which the late positive complex (LPC) was elicited by 50 msec white noise pips of various intensities. Principal Components Analysis was used to decompose event-related potential wave forms. In the first experiment noise pips were presented every 4 sec at intensities ranging from 55 to 115 dB SPL under 3 attention conditions: counting the stimuli, ignoring them, or performing a visual search task. Higher intensities produced larger blink, P190, P280 and P340 components. Attention affected blink, P190, P340 and slow wave (SW) components. In the second experiment stimulus intensity ranged in one run between 80 and 110 dB, the probability of the 110 dB stimulus being 0.25; in the other run, stimuli were always 110 dB. P310 was sensitive to both intensity and probability, while SW was affected only by probability. In the third experiment the habituation of the LPC and skin conductance response (SCR) to 115 dB noise pips presented at random intervals between 10 and 90 sec was examined over 62 trials. The amplitude of blink, N95 and P265 declined over trials, and SCR increased after an unexpected verbal message. These results show that components of the LPC with latencies around 30 msec have both exogenous and endogenous properties. Only SW was completely independent of stimulus intensity in these experiments.en_US
dc.languageengen_US
dc.publisherElsevier Ireland Ltd. The Journal's web site is located at http://www.elsevier.com/locate/clinphen_US
dc.relation.ispartofElectroencephalography and Clinical Neurophysiologyen_US
dc.subject.meshAdolescenten_US
dc.subject.meshAdulten_US
dc.subject.meshAnalysis Of Varianceen_US
dc.subject.meshAuditory Cortex - Physiologyen_US
dc.subject.meshAuditory Thresholden_US
dc.subject.meshElectroencephalographyen_US
dc.subject.meshFemaleen_US
dc.subject.meshHumansen_US
dc.subject.meshMaleen_US
dc.titleAuditory stimulus intensity effects on components of the late positive complexen_US
dc.typeArticleen_US
dc.identifier.emailBlowers, GH:blowers@hku.hken_US
dc.identifier.authorityBlowers, GH=rp00577en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/0013-4694(82)90155-9en_US
dc.identifier.pmid6179738-
dc.identifier.scopuseid_2-s2.0-0019942608en_US
dc.identifier.volume54en_US
dc.identifier.issue2en_US
dc.identifier.spage132en_US
dc.identifier.epage146en_US
dc.identifier.isiWOS:A1982PG43000004-
dc.publisher.placeIrelanden_US
dc.identifier.scopusauthoridRoth, WT=7201760495en_US
dc.identifier.scopusauthoridBlowers, GH=6701855848en_US
dc.identifier.scopusauthoridDoyle, CM=24560432800en_US
dc.identifier.scopusauthoridKopell, BS=7004055682en_US

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