Increasing suppression of saccade-related transients along the human visual hierarchy

  • A key hallmark of visual perceptual awareness is robustness to instabilities arising from unnoticeable eye and eyelid movements. In previous human intracranial (iEEG) work (Golan et al., 2016) we found that excitatory broadband high-frequency activity transients, driven by eye blinks, are suppressed in higher-level but not early visual cortex. Here, we utilized the broad anatomical coverage of iEEG recordings in 12 eye-tracked neurosurgical patients to test whether a similar stabilizing mechanism operates following small saccades. We compared saccades (1.3°−3.7°) initiated during inspection of large individual visual objects with similarly-sized external stimulus displacements. Early visual cortex sites responded with positive transients to both conditions. In contrast, in both dorsal and ventral higher-level sites the response to saccades (but not to external displacements) was suppressed. These findings indicate that early visual cortex is highly unstable compared to higher-level visual regions which apparently constitute the main target of stabilizing extra-retinal oculomotor influences.
Author:Tal Golan, Ido Davidesco, Meir Meshulam, David M. Groppe, Pierre Mégevand, Erin M. Yeagle, Matthew S. Goldfinger, Michal Harel, Lucia Melloni, Charles E. Schroeder, Leon Y. Deouell, Ashesh D. Mehta, Rafael Malach
Pubmed Id:
Parent Title (English):eLife
Publisher:eLife Sciences Publications
Place of publication:Cambridge
Contributor(s):Tatiana Pasternak
Document Type:Article
Year of Completion:2017
Date of first Publication:2017/08/29
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2018/05/29
Tag:efferent copy; electrocorticography; human; neuroscience; saccades; visual cortex; visual perception
Page Number:15
First Page:1
Last Page:15
Copyright Golan et al. This article is distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use and redistribution provided that the original author and source are credited.
Institutes:Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Angeschlossene und kooperierende Institutionen / MPI für Hirnforschung
Dewey Decimal Classification:1 Philosophie und Psychologie / 15 Psychologie / 150 Psychologie
Licence (German):License LogoCreative Commons - Namensnennung 4.0