Areas V1 and V2 show microsaccade-related 3-4-Hz covariation in gamma power and frequency
| Autor: | P De Weerd, Pascal Fries, Conrado A. Bosman, Mark Roberts, Eric Lowet |
|---|---|
| Přispěvatelé: | Cognitive and Systems Neuroscience (SILS, FNWI), RS: FPN CN 3, Perception, RS: FPN MaCSBio |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Male MACAQUE MONKEY gamma-band response Local field potential Macaque Synchronization (alternating current) 0302 clinical medicine Neural Pathways Gamma Rhythm Cortical Synchronization Theta Rhythm Visual Cortex biology General Neuroscience 120 000 Neuronal Coherence 160 000 Neuronal Oscillations Signal Processing Computer-Assisted saccade PRIMARY VISUAL-CORTEX medicine.anatomical_structure Saccade THETA Microsaccade monkey Psychology Biophysics BAND SYNCHRONIZATION BRAIN SIGNALS NEURONAL OSCILLATIONS 150 000 MR Techniques in Brain Function 03 medical and health sciences biology.animal medicine Saccades COHERENCE Coherence (signal processing) Animals ATTENTION electrophysiology Macaca mulatta Electrophysiology 030104 developmental biology Visual cortex visual system ALPHA-ACTIVITY EYE-MOVEMENTS Neuroscience 030217 neurology & neurosurgery 120 013 Primate Research Maastricht Photic Stimulation |
| Zdroj: | European Journal of Neuroscience Europe PubMed Central European Journal of Neuroscience, 43(10), 1286-1296. Wiley-Blackwell European Journal of Neuroscience, 43(10), 1286-1296. Wiley |
| ISSN: | 0953-816X |
| Popis: | Neuronal gamma-band synchronization (25-90 Hz) in visual cortex appears sustained and stable during prolonged visual stimulation when investigated with conventional averages across trials. Yet, recent studies in macaque visual cortex have used single-trial analyses to show that both power and frequency of gamma oscillations exhibit substantial moment-by-moment variation. This has raised the question whether these apparently random variations might limit the functional role of gamma-band synchronization for neural processing. Here, we studied the moment-by-moment variation of gamma oscillation power and frequency, as well as inter-areal gamma synchronization by simultaneously recording local field potentials in V1 and V2 of two macaque monkeys. We additionally analyzed electrocorticographic (ECoG) V1 data from a third monkey. Our analyses confirm that gamma-band synchronization is not stationary and sustained but undergoes moment-by-moment variations in power and frequency. However, those variations are neither random and nor a possible obstacle to neural communication. Instead, the gamma power and frequency variations are highly structured, shared between areas, and shaped by a microsaccade-related 3-4 Hz theta rhythm. Our findings provide experimental support for the suggestion that cross-frequency coupling might structure and facilitate the information flow between brain regions. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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