Please use this identifier to cite or link to this item:
Title: Cortical functional topography of high-frequency gamma activity relates to perceptual decision: an Intracranial study
Authors: Castelhano, J. 
Duarte, Isabel C. 
Abuhaiba, Sulaiman I. 
Rito, Manuel
Sales, Francisco 
Castelo-Branco, Miguel 
Issue Date: 2017
Publisher: Public Library of Science
Project: FP7-HEALTH-2013- INNOVATION-1-602186-BRAINTRAIN, 
UID/NEU/ 04539/2013 COMPETE POCI-01-0145-FEDER- 007440 
Centro 2020 FEDER 
POCI-01- 0145-FEDER-016428. Bial 373/14 
Serial title, monograph or event: PLoS ONE
Volume: 12
Issue: 10
Abstract: High-frequency activity (HFA) is believed to subserve a functional role in cognition, but these patterns are often not accessible to scalp EEG recordings. Intracranial studies provide a unique opportunity to link the all-encompassing range of high-frequency patterns with holistic perception. We tested whether the functional topography of HFAs (up to 250Hz) is related to perceptual decision-making. Human intracortical data were recorded (6 subjects; >250channels) during an ambiguous object-recognition task. We found a spatial topography of HFAs reflecting processing anterior dorsal and ventral streams, linked to decision independently of the type of processed object/stimulus category. Three distinct regional fingerprints could be identified, with lower gamma frequency patterns (<45Hz) dominating in the anterior semantic ventral object processing and dorsoventral integrating networks and evolving later, during perceptual decision phases, than early sensory posterior patterns (60-250Hz). This suggests that accurate object recognition/perceptual decision-making is related to distinct spatiotemporal signatures in the low gamma frequency range.
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0186428
Rights: openAccess
Appears in Collections:I&D CIBIT - Artigos em Revistas Internacionais

Show full item record

Page view(s)

checked on Nov 28, 2023


checked on Nov 28, 2023

Google ScholarTM




This item is licensed under a Creative Commons License Creative Commons