Dissociation of event-related potentials indexing arousal and semantic cohesion during emotional word encoding.

Published

Journal Article

Event-related potential (ERP) studies have shown that emotional stimuli elicit greater amplitude late positive-polarity potentials (LPPs) than neutral stimuli. This effect has been attributed to arousal, but emotional stimuli are also more semantically coherent than uncategorized neutral stimuli. ERPs were recorded during encoding of positive, negative, uncategorized neutral, and categorized neutral words. Differences in LPP amplitude elicited by emotional versus uncategorized neutral stimuli were evident from 450 to 1000 ms. From 450 to 700 ms, LPP effects at midline and right hemisphere frontal electrodes indexed arousal, whereas LPP effects at left hemisphere centro-parietal electrodes indexed semantic cohesion. This dissociation helps specify the processes underlying emotional stimulus encoding, and suggests the need to control for semantic cohesion in emotional information processing studies.

Full Text

Duke Authors

Cited Authors

  • Dillon, DG; Cooper, JJ; Grent-'t-Jong, T; Woldorff, MG; LaBar, KS

Published Date

  • October 2006

Published In

Volume / Issue

  • 62 / 1

Start / End Page

  • 43 - 57

PubMed ID

  • 16678953

Pubmed Central ID

  • 16678953

Electronic International Standard Serial Number (EISSN)

  • 1090-2147

International Standard Serial Number (ISSN)

  • 0278-2626

Digital Object Identifier (DOI)

  • 10.1016/j.bandc.2006.03.008

Language

  • eng