Enhancing visual motion discrimination by desynchronizing bifocal oscillatory activity

Autor: Sarah B. Zandvliet, Estelle Raffin, Christoph M. Michel, Paul Sauseng, Krystel R. Huxlin, Friedhelm C. Hummel, Roberto F. Salamanca-Giron, Martin Seeber
Rok vydání: 2021
Předmět:
Adult
Male
Adolescent
Motion discrimination
Cognitive Neuroscience
Motion Perception
Alpha (ethology)
Neurosciences. Biological psychiatry. Neuropsychiatry
Stimulation
Transcranial Direct Current Stimulation
050105 experimental psychology
Discrimination Learning
Visual processing
Young Adult
03 medical and health sciences
0302 clinical medicine
Phase-amplitude coupling
medicine
Humans
0501 psychology and cognitive sciences
Multisite tACS
Visual Cortex
Transcranial alternating current stimulation
Physics
05 social sciences
Healthy subjects
Electroencephalography
Phase synchronization
Visual motion
Alpha Rhythm
Visual cortex
medicine.anatomical_structure
Neurology
Female
Neuroscience
Photic Stimulation
Oscillatory synchronization
Noninvasive brain stimulation
030217 neurology & neurosurgery
RC321-571
Zdroj: NeuroImage, Vol 240, Iss, Pp 118299-(2021)
ISSN: 1053-8119
DOI: 10.1016/j.neuroimage.2021.118299
Popis: Visual motion discrimination involves reciprocal interactions in the alpha band between the primary visual cortex (V1) and mediotemporal areas (V5/MT). We investigated whether modulating alpha phase synchronization using individualized multisite transcranial alternating current stimulation (tACS) over V5 and V1 regions would improve motion discrimination. We tested 3 groups of healthy subjects with the following conditions: (1) individualized In-Phase V1alpha-V5alpha tACS (0° lag), (2) individualized Anti-Phase V1alpha-V5alpha tACS (180° lag) and (3) sham tACS. Motion discrimination and EEG activity were recorded before, during and after tACS. Performance significantly improved in the Anti-Phase group compared to the In-Phase group 10 and 30Â min after stimulation. This result was explained by decreases in bottom-up alpha-V1 gamma-V5 phase-amplitude coupling. One possible explanation of these results is that Anti-Phase V1alpha-V5alpha tACS might impose an optimal phase lag between stimulation sites due to the inherent speed of wave propagation, hereby supporting optimized neuronal communication.
Databáze: OpenAIRE
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