Document Detail


Single-trial detection of human brain responses evoked by laser activation of Adelta-nociceptors using the wavelet transform of EEG epochs.
MedLine Citation:
PMID:  15135938     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of this study was to identify EEG changes induced by Adelta-nociceptor activation in single trials. In a preliminary experiment, intense CO(2) laser stimuli were delivered to the hand dorsum of five volunteers. The average amplitude of EEG epochs was estimated in the time-frequency (TF) domain using the continuous Morlet wavelet transform (CMT). The result was used as a TF filter enhancing Adelta-nociceptor induced EEG responses. In a second experiment, eight other subjects were delivered laser stimuli with six intensities. The CMT of each EEG epoch was computed. After applying the TF filter, amplitudes within a predefined interval were summed. Whether this sum predicted the occurrence of Adelta-nociceptor activation was tested using the reaction-time to discriminate between Adelta- or C-fibre mediated detection. Results showed that this method accurately identified single-trial EEG responses to Adelta-nociceptor activation.
Authors:
André Mouraux; Léon Plaghki
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Neuroscience letters     Volume:  361     ISSN:  0304-3940     ISO Abbreviation:  Neurosci. Lett.     Publication Date:  2004 May 
Date Detail:
Created Date:  2004-05-11     Completed Date:  2004-08-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7600130     Medline TA:  Neurosci Lett     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  241-4     Citation Subset:  IM    
Affiliation:
Laboratoire de Neurophysiologie (NEFY), Université Catholique de Louvain, Louvain, Belgium. andre.mouraux@nefy.ucl.ac.be
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MeSH Terms
Descriptor/Qualifier:
Adult
Afferent Pathways / physiology*,  radiation effects
Cerebral Cortex / physiology*
Dose-Response Relationship, Radiation
Electroencephalography / methods
Evoked Potentials / physiology*
Fourier Analysis
Hot Temperature / adverse effects
Humans
Lasers
Nerve Fibers, Myelinated / physiology*,  radiation effects
Nerve Fibers, Unmyelinated / physiology,  radiation effects
Nociceptors / physiology*,  radiation effects
Pain / physiopathology*
Reaction Time / physiology,  radiation effects

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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