Document Detail

An electrophysiological study of the mental rotation of polygons.
MedLine Citation:
PMID:  8080977     Owner:  NLM     Status:  MEDLINE    
Reaction times and event-related potentials (ERPs) were recorded during a task requiring subjects to decide whether two sequentially presented polygons had the same shape regardless of differences in orientation. Reaction times increased approximately linearly with angular departure from upright orientation, which suggests that mental rotation was involved in the comparison process. The ERPs showed, between 665 and 1055 ms, a late posterior negativity also increasing with angular disparity from upright, which we assumed to reflect mental rotation. Two other activities were exhibited, from 265 to 665 ms, which may be related either to an evaluation of the stimulus or a predetermination of its orientation, and from 1055 to 1600 ms attributed to the decision process.
A Pierret; F Peronnet; M Thevenet
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Neuroreport     Volume:  5     ISSN:  0959-4965     ISO Abbreviation:  Neuroreport     Publication Date:  1994 May 
Date Detail:
Created Date:  1994-10-11     Completed Date:  1994-10-11     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9100935     Medline TA:  Neuroreport     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1153-6     Citation Subset:  IM    
Laboratoire de recherche sur les signaux et processus cérébraux, INSERM-UNITE 280, Lyon, France.
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MeSH Terms
Evoked Potentials, Visual / physiology
Form Perception / physiology
Imagination / physiology*
Reaction Time / physiology

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