Oscillatory Activity in Prefrontal Cortex during Implicit Letter-Location Binding

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Details zur Publikation

Autorenliste: Maestu F
Ort: NEW YORK
Jahr der Veröffentlichung: 2010
Bandnummer: 28
Erste Seite: 350
Letzte Seite: 353
Seitenumfang: 4
ISBN: 978-3-642-12196-8
Sprachen: Englisch-Vereinigtes Königreich (EN-GB)


Beschreibung

In this study we demonstrated implicit verbal-spatial binding effects
that were dependent on the task-relevant feature. We used MEG to measure
brain activity underpinning the maintenance of verbal and spatial
features in two recognition tasks, based on a letter-location paradigm
previously used in binding studies. Both tasks were identical in terms
of their perceptual characteristics and only differed with respect to
the instructions given. Thus, in the verbal task participants attended
consonants, while in the spatial task they attended locations. We
observed that maintaining the identity of verbal information
(consonants) arranged in a spatially distributed manner resulted in the
concurrent processing of task-irrelevant location information.
Critically, the reverse relationship does not hold true, supporting the
notion of associative asymmetry. This implicit verbal-spatial binding
was linked to a specific effect described as a greater oscillatory
activity over prefrontal regions in "classical" frequency bands during
the first half of the retention period and accompanied by greater
activity in PPC and temporal regions.


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Zuletzt aktualisiert 2017-13-04 um 11:47