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Lookup NU author(s): Dr Alwin GieselmannORCiD, Professor Alexander Thiele
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2022, Gieselmann and Thiele. Perception and cognition require the integration of feedforward sensory information with feedback signals. Using different sized stimuli, we isolate spectral signatures of feedforward and feedback signals, and their effect on communication between layers in primary visual cortex of male macaque monkeys. Small stimuli elicited gamma frequency oscillations predominantly in the superficial layers. These Granger-causally originated in upper layer 4 and lower supragranular layers. Unexpectedly, large stimuli generated strong narrow band gamma oscillatory activity across cortical layers. They Granger-causally arose in layer 5, were conveyed through layer six to superficial layers, and violated existing models of feedback spectral signatures. Equally surprising, with large stimuli, alpha band oscillatory activity arose predominantly in granular and supragranular layers and communicated in a feedforward direction. Thus, oscillations in specific frequency bands are dynamically modulated to serve feedback and feedforward communication and are not restricted to specific cortical layers in V1.
Author(s): Gieselmann MA, Thiele A
Publication type: Article
Publication status: Published
Journal: eLife
Year: 2022
Volume: 11
Online publication date: 11/03/2022
Acceptance date: 08/02/2022
Date deposited: 28/03/2022
ISSN (electronic): 2050-084X
Publisher: eLife Sciences Publications Ltd
URL: https://doi.org/10.7554/eLife.62949
DOI: 10.7554/eLife.62949
PubMed id: 35274614
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