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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: | CENTRO-07-ST24-FEDER-00205 info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID/NEU/04539/2013/PT CENTRO-01-0145-FEDER-000016/BIGDATIMAGE SAICTPAC/0010/2015 |
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. | URI: | https://hdl.handle.net/10316/108323 | ISSN: | 1932-6203 | DOI: | 10.1371/journal.pone.0186428 | Rights: | openAccess |
Appears in Collections: | I&D CIBIT - Artigos em Revistas Internacionais |
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Cortical-functional-topography-of-highfrequency-gamma-activity-relates-to-perceptual-decision-An-Intracranial-studyPLoS-ONE.pdf | 6.53 MB | Adobe PDF | View/Open |
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