Document Detail

Newborn human brain identifies repeated auditory feature conjunctions of low sequential probability.
MedLine Citation:
PMID:  15548225     Owner:  NLM     Status:  MEDLINE    
Natural environments are usually composed of multiple sources for sounds. The sounds might physically differ from one another only as feature conjunctions, and several of them might occur repeatedly in the short term. Nevertheless, the detection of rare sounds requires the identification of the repeated ones. Adults have some limited ability to effortlessly identify repeated sounds in such acoustically complex environments, but the developmental onset of this finite ability is unknown. Sleeping newborn infants were presented with a repeated tone carrying six frequent (P = 0.15 each) and six rare (P approximately 0.017 each) conjunctions of its frequency, intensity and duration. Event-related potentials recorded from the infants' scalp were found to shift in amplitude towards positive polarity selectively in response to rare conjunctions. This finding suggests that humans are relatively hard-wired to preattentively identify repeated auditory feature conjunctions even when such conjunctions occur rarely among other similar ones.
Timo Ruusuvirta; Minna Huotilainen; Vineta Fellman; Risto Näätänen
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The European journal of neuroscience     Volume:  20     ISSN:  0953-816X     ISO Abbreviation:  Eur. J. Neurosci.     Publication Date:  2004 Nov 
Date Detail:
Created Date:  2004-11-19     Completed Date:  2005-03-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8918110     Medline TA:  Eur J Neurosci     Country:  France    
Other Details:
Languages:  eng     Pagination:  2819-21     Citation Subset:  IM    
Cognitive Brain Research Unit, Department of Psychology, PO Box 9, FIN-00014 University of Helsinki, Helsinki, Finland.
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MeSH Terms
Acoustic Stimulation / methods
Brain / physiology*
Brain Mapping
Dose-Response Relationship, Radiation
Electroencephalography / methods
Evoked Potentials / physiology,  radiation effects
Identification (Psychology)*
Infant, Newborn
Sleep / physiology

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

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