A bilateral N2pc (N2pcb) component is elicited by search targets displayed on the vertical midline.
ERPs
N2pc
midline targets
visual search
Journal
Psychophysiology
ISSN: 1540-5958
Titre abrégé: Psychophysiology
Pays: United States
ID NLM: 0142657
Informations de publication
Date de publication:
03 2020
03 2020
Historique:
received:
05
06
2019
revised:
11
11
2019
accepted:
18
11
2019
pubmed:
10
12
2019
medline:
2
2
2021
entrez:
10
12
2019
Statut:
ppublish
Résumé
The study of visually elicited event-related potentials (ERPs) detected at posterior recording sites during visual search has enormously advanced our knowledge about how and when visuo-spatial attention locks onto one or more laterally presented target objects. The N2pc component to lateral targets has been pivotal to further our understanding of the mechanisms and time course of target selection in visual search. However, the N2pc cannot track visuo-spatial attention deployment to targets displayed along the vertical midline. Here, we introduce a new ERP marker (N2pcb component) that is elicited during the selection of such midline targets. In line with retinal and callosal projections from striate to ventral extrastriate cortex, this component reflects an enhanced negativity elicited by midline targets over both posterior hemispheres. By comparing the attentional selection of lateral and midline targets in a singleton search condition and a feature search condition, we show that the N2pcb is triggered at the same time as the N2pc to lateral targets, and shows the same onset latency difference between singleton and feature search. We conclude that the N2pcb and N2pc components reflect the same attentional target selection processes in visual search.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e13512Informations de copyright
© 2019 Society for Psychophysiological Research.
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