Resumo

TABULLO, Angel et al. Brain potentiales associated with logic categorization in humans: descriptive study and experimental issues. Anu. investig. [online]. 2007, vol.14, pp.00-00. ISSN 1851-1686.

The present work investigates electroneurophysiological aspects of logical category learning in healthy human subjects, from a biocomportamental standpoint. Event - related potentials method (ERPs) was used to measure subject's electric brain activity, while performing an equivalence relations task (Sidman, 1982). As a result, the following temporal succession was observed in association with the comparison stimuli: an early visual potential in the occipital region, then a negative potential in the frontal region and a late parietal positivity. Finally, a lateralized central negativity was observed, in synchrony with the subject's answers. The functional meaning of the observed ERPs is discussed, and it is proposed to examine the correspondence between different ERP components timing and reaction times, as an experimental device for the study of functional and structural aspects of complex behavior in humans.

Palavras-chave : Categories; Equivalence clases; Match to sample; Event related potentials.

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