Document Detail

The development of visual P3a and P3b.
MedLine Citation:
PMID:  17650994     Owner:  NLM     Status:  MEDLINE    
The relationship of visual P3a and P3b to age and neuropsychological performance was investigated in 26 healthy children (6.8-15.8 years) and 129 adult volunteers (20.0-88.8 years). Within the sample of children, an effect of age on midline topography was observed, with higher frontal amplitudes in the youngest compared to the oldest children. Increasing age was associated with lower P3a and P3b amplitude and shorter P3b latency at Fz. Performance on neuropsychological tests (matrix reasoning from WASI, digit span from WAIS, word order and hand movement from Kaufman) was only weakly associated with measures of P3a and P3b. The analyses were then repeated with the full life-span sample (n = 155). It was found that for P3a, amplitude decreased and latency increased with age. For P3b, the pattern was more complex, with a nonlinear amplitude reduction and no latency change with age. It appears that the development of P3a in children represents the start of processes that later continue in the adult life-span, but that the automatic processes indexed by P3a seems to mature earlier than the controlled processes reflected by P3b. Finally, it was demonstrated that the relationships between neuropsychological test scores (matrix reasoning, digit span) and P3 parameters were complex, following a mix of linear and nonlinear patterns. It is suggested that the neuropsychological significance of the different P3a and P3b parameters may change from childhood to the adult life-span.
Signe Stige; Anders M Fjell; Lars Smith; Magnus Lindgren; Kristine B Walhovd
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Developmental neuropsychology     Volume:  32     ISSN:  8756-5641     ISO Abbreviation:  Dev Neuropsychol     Publication Date:  2007  
Date Detail:
Created Date:  2007-07-26     Completed Date:  2007-10-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8702038     Medline TA:  Dev Neuropsychol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  563-84     Citation Subset:  IM    
Institute of Psychology, University of Oslo, Norway.
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MeSH Terms
Age Factors
Aged, 80 and over
Analysis of Variance
Electroencephalography / methods
Event-Related Potentials, P300 / physiology*
Human Development*
Middle Aged
Neuropsychological Tests
Photic Stimulation / methods
Visual Cortex / physiology*

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

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