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Tracking the dynamics of perisaccadic visual signals with magnetoencephalography

Konstantinos Nasiotis, Sujaya Neupane, Shahab Bakhtiari, Sylvain Baillet, Christopher C. Pack
doi: https://doi.org/10.1101/2022.01.19.476936
Konstantinos Nasiotis
1McGill University
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  • For correspondence: konstantinos@nevronas.io
Sujaya Neupane
2Massachusetts Institute of Technology
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Shahab Bakhtiari
3MILA, McGill University
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Sylvain Baillet
1McGill University
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Christopher C. Pack
1McGill University
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Abstract

Many brain functions are difficult to localize, as they involve distributed networks that reconfigure themselves on short timescales. One example is the integration of oculomotor and visual signals that occurs with each eye movement: The brain must combine motor signals about the eye displacement with retinal signals, to infer the structure of the surrounding environment. Our understanding of this process comes primarily from single-neuron recordings, which are limited in spatial extent, or fMRI measurements, which have poor temporal resolution. We have therefore studied visual processing during eye movements, using magnetoencephalography (MEG), which affords high spatiotemporal resolution. Human subjects performed a task in which they reported the orientation of a visual stimulus while executing a saccade. After removal of eye movement artifacts, time-frequency analysis revealed a signal that propagated in the beta-frequency band from parietal cortex to visual cortex. This signal had the characteristics of perisaccadic “remapping”, a neural signature of the integration of oculomotor and visual signals. These results reveal a novel mechanism of visual perception and demonstrate that MEG can provide a useful window into distributed brain functions.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted January 21, 2022.
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Tracking the dynamics of perisaccadic visual signals with magnetoencephalography
Konstantinos Nasiotis, Sujaya Neupane, Shahab Bakhtiari, Sylvain Baillet, Christopher C. Pack
bioRxiv 2022.01.19.476936; doi: https://doi.org/10.1101/2022.01.19.476936
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Tracking the dynamics of perisaccadic visual signals with magnetoencephalography
Konstantinos Nasiotis, Sujaya Neupane, Shahab Bakhtiari, Sylvain Baillet, Christopher C. Pack
bioRxiv 2022.01.19.476936; doi: https://doi.org/10.1101/2022.01.19.476936

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