Article
Version 1
Preserved in Portico This version is not peer-reviewed
Hemispheric Asymmetry in Visual Processing: An ERP Study on Spatial Frequency Gratings
Version 1
: Received: 31 December 2020 / Approved: 4 January 2021 / Online: 4 January 2021 (12:27:21 CET)
A peer-reviewed article of this Preprint also exists.
Proverbio, A.M.; Zani, A. Hemispheric Asymmetry in Visual Processing: an ERP Study on Spatial Frequency Gratings. Symmetry 2021, 13, 180. Proverbio, A.M.; Zani, A. Hemispheric Asymmetry in Visual Processing: an ERP Study on Spatial Frequency Gratings. Symmetry 2021, 13, 180.
Abstract
A hemispheric asymmetry is known for the processing of global vs. local visual information. In this study, we investigated the existence of a hemispheric asymmetry for visual processing of low vs. high spatial frequency gratings. Event-related potentials were recorded in a group of healthy right-handed volunteers from 30 scalp sites. Six types of stimuli (1.5, 3 and 6 c/deg gratings) were randomly flashed 180 times in the left and right upper hemi-fields. Stimulus duration was 80 ms and ISI ranged between 850-1000 ms. Participants had to pay attention and respond to targets based on their spatial frequency and location, or to passively look at the stimuli. C1 and P1 visual responses, as well as a later Selection negativity and a P300 components of ERPs were quantified and subjected to repeated-measure ANOVAs. Overall, performance was faster for the RVF, thus suggesting a left hemispheric advantage for attentional selection of local elements. Similarly, the analysis of mean area amplitude of C1 (60-110 ms) sensory response showed a stronger attentional effect (F+L+ vs. F-L+) at left occipital areas, thus suggesting the sensory nature of this hemispheric asymmetry.
Keywords
ERPs; selective attention; global/local; cerebral hemispheres; VEPs; spatial frequency; Attentional tuning; Left hemisphere
Subject
Social Sciences, Psychology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment
