Document Detail


The late Nd reflects a memory trace containing amodal spatial information.
MedLine Citation:
PMID:  16176375     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The early Nd reflects the analysis of simple features of selectively attended auditory stimuli, but the precise nature of the more complex processing reflected by the late Nd is unclear. The late but not the early Nd is sensitive to interference from a concurrently presented visual spatial attention switching task. This experiment investigated whether the late Nd is also sensitive to deeper visual attention switching. Twenty-one subjects performed a dichotic listening task concurrently with either visual spatial or visual letter matching attention switching tasks. Late Nd amplitude was reduced by the spatial but not the letter matching task, indicating insensitivity to deeper attention switching. P300 amplitude was reduced by both tasks. Reductions in N100 and P200 were uncorrelated. We propose that, in part, the late Nd reflects an amodal memory trace containing spatial information, possibly involving a "where" rather than a "what" auditory pathway.
Authors:
Sean Meehan; Anthony Singhal; Barry Fowler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Psychophysiology     Volume:  42     ISSN:  0048-5772     ISO Abbreviation:  Psychophysiology     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-09-22     Completed Date:  2006-03-07     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0142657     Medline TA:  Psychophysiology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  531-9     Citation Subset:  IM    
Affiliation:
Department of Kinesiology and Health Science, York University, North York, Ontario, Canada.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Attention / physiology*
Auditory Pathways / physiology
Cerebral Cortex / physiology
Contingent Negative Variation / physiology*
Dichotic Listening Tests
Electroencephalography*
Event-Related Potentials, P300 / physiology
Female
Functional Laterality / physiology
Humans
Male
Orientation / physiology*
Pattern Recognition, Visual / physiology*
Pitch Discrimination / physiology
Psychomotor Performance / physiology
Reaction Time / physiology
Space Perception / physiology*

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


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