Brain mapping of bilateral visual interactions in children

Steger, J. and Imhof, K. and Denoth, J. and Pascual-Marqui, R. D. and Steinhausen, H. C. and Brandeis, D.. (2001) Brain mapping of bilateral visual interactions in children. Psychophysiology, 38 (2). pp. 243-253.

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Official URL: http://edoc.unibas.ch/dok/A5838931

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Interhemispheric interactions were studied with functional brain mapping of visual processing. Children performed a reaction time task with uni- and bilateral targets and nontargets. The visual evoked potential (VEP) was segmented into P1a, P1b, and N1 microstates using map rather than channel features. Map latencies, amplitudes and sources were tested for bilateral interactions. Bilateral targets yielded shorter VEP map latencies but later response onsets than unilateral ones. Source analyses of the unilateral VEPs indicated a transition from contra- (P1a) to ipsilateral (P1b) visual cortex activation (interhemispheric transfer). Bilateral VEPs were smaller than the summed unilateral VEPs in all microstates. indicating that interhemispheric interactions both precede and follow interhemispheric transfer. Brain mapping of uni- and bilateral VEPs in children thus revealed several distinct forms of interhemispheric interactions in the same, early time range.
Faculties and Departments:07 Faculty of Psychology > Departement Psychologie > Ehemalige Einheiten Psychologie > Clinical Child and Adolescent Psychology (Schneider)
UniBasel Contributors:Steinhausen, Hans-Christoph
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:27 Nov 2017 13:08
Deposited On:08 Jun 2012 06:43

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