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Your search keyword '"Palva, J. Matias"' showing total 16 results
Start Over Author "Palva, J. Matias" Publisher cold spring harbor laboratory
16 results on '"Palva, J. Matias"'

1. Hierarchical model of human brain oscillations

Author

Myrov, Vladislav, primary, Suleimanova, Alina, additional, Knapic, Samanta, additional, Liu, Wenya, additional, Partanen, Paula, additional, Vesterinen, Maria, additional, Palva, Satu, additional, and Palva, J Matias, additional

Published
2024
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13. High-alpha band synchronization across frontal, parietal and visual cortex mediates behavioral and neuronal effects of visuospatial attention

Author

Lobier, Muriel, Palva, J. Matias, Palva, Satu, Neuroscience Center, BioMag Laboratory, Clinicum, University of Helsinki, Helsinki Institute of Life Science HiLIFE, Joint Activities, and Matias Palva / Principal Investigator

Subjects
Male, 0301 basic medicine, Visual perception, Synchronization networks, Electroencephalography, 3124 Neurology and psychiatry, 0302 clinical medicine, Synchronization (computer science), Premovement neuronal activity, Attention, EEG, Cortical Synchronization, GAMMA OSCILLATIONS, Cerebral Cortex, 0303 health sciences, MEG, medicine.diagnostic_test, Magnetoencephalography, Magnetic Resonance Imaging, medicine.anatomical_structure, Neurology, Visual Perception, Female, Psychology, Cognitive psychology, Adult, Oscillations, Frequency band, Cognitive Neuroscience, SPATIAL ATTENTION, Synchronization, FREQUENCY, MECHANISMS, Young Adult, 03 medical and health sciences, medicine, Humans, MODULATION, 030304 developmental biology, Alpha, PERCEPTION, 3112 Neurosciences, Phase synchronization, RHYTHMS, BRAIN NETWORKS, 030104 developmental biology, Visual cortex, TOP-DOWN, Neuroscience, Photic Stimulation, 030217 neurology & neurosurgery
Abstract

Visuospatial attention prioritizes processing of attended visual stimuli. It is characterized by lateralized alpha-band (8-14 Hz) amplitude suppression in visual cortex and increased neuronal activity in a network of frontal and parietal areas. It has remained unknown what mechanisms coordinate neuronal processing among frontoparietal network and visual cortices and implement the attention-related modulations of alpha-band amplitudes and behavior. We investigated whether large-scale network synchronization could be such a mechanism. We recorded human cortical activity with magnetoencephalography (MEG) during a visuospatial attention task. We then identified the frequencies and anatomical networks of inter-areal phase synchronization from source localized MEG data. We found that visuospatial attention is associated with robust and sustained long-range synchronization of cortical oscillations exclusively in the high-alpha (10-14 Hz) frequency band. This synchronization connected frontal, parietal and visual regions and was observed concurrently with amplitude suppression of low-alpha (6-9 Hz) band oscillations in visual cortex. Furthermore, stronger high-alpha phase synchronization was associated with decreased reaction times to attended stimuli and larger suppression of alpha-band amplitudes. These results thus show that high-alpha band phase synchronization is functionally significant and could coordinate the neuronal communication underlying the implementation of visuospatial attention.

Published
2017

14. Effect of fluoxetine on adult amblyopia: a placebo-controlled study combining neuroplasticity-enhancing pharmacological intervention and perceptual training

Author

Huttunen, Henri J., primary, Palva, J. Matias, additional, Lindberg, Laura, additional, Palva, Satu, additional, Saarela, Ville, additional, Karvonen, Elina, additional, Latvala, Marja-Leena, additional, Liinamaa, Johanna, additional, Booms, Sigrid, additional, Castrén, Eero, additional, and Uusitalo, Hannu, additional

Published
2018
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