 |
| Research article summary (published 30 Dec 2001): |
The effect of background noise on P300 to suprathreshold stimuli.
Full Abstract
Both the amplitude and latency of P300 vary with changes in stimulus parameters. Stimuli at intensities or pitch separations near threshold evoke a smaller and later P300. P300 is also affected by extraneous stimulus parameters in tasks where stimulus frequency separation is large and stimuli are well above intensity thresholds. For example, the presence of background white noise when tones are suprathreshold and easily detectable has been reported to increase P300 latency. However, the effects of background masking noise on P300 amplitude and scalp topography have not been reported. Subjects performed an oddball task both in the presence and in the absence of background noise. Performance accuracy was unaffected by background noise. P300 showed latency increases when noise was present, but P300 peak amplitude was unaffected. P300 scalp topography was stable across both conditions. P300 latency is affected by background noise, even when performance is not, but amplitude and amplitude topography remain unaffected.
Learn Faster Today Improve your study skills
Author information
Author/s: Salisbury, Dean F (DF); Desantis, Massimo A (MA); Shenton, Martha E (ME); McCarley, Robert W (RW);
Affiliation: Harvard Medical School, Department of Psychiatry, McLean Hospital, Belmont, Massachusetts 02478, USA. dean_salisbury(-atsign-)hms.harvard.edu
Grants: MH 01110 (Agency:United States NIMH) ; MH 40977 (Agency:United States NIMH) ; MH 50747 (Agency:United States NIMH)
Journal and publication information
Publication Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.
Journal: Psychophysiology (Psychophysiology), published in United States. (Language: eng)
Reference: 2002-Jan; vol 39 (issue 1) : pp 111-5
Dates: Created 2002/09/02; Completed 2002/10/02; Revised 2007/11/14;
PMID: 12206291, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
External Links for this article (including full text providers, if available):
Click Electronic Full-text Provider Links to see options for finding the electronic full text links to this article. Note there may be a subscription or fee required for access to the full text. See our FAQ for information on finding FREE full text articles.
This article may also be located in paper journal collections available in many libraries. Use the Journal and Publication Information above to find the full article.
MeSH headings (categories)
This article was linked to the MESH Headings shown below.
|
Related articles
This article has not been indexed for related articles as yet, however you can still use the live related article search links below.
See a large map of 100+ related articles.