S
Supratim Ray
Researcher at Indian Institute of Science
Publications - 50
Citations - 3691
Supratim Ray is an academic researcher from Indian Institute of Science. The author has contributed to research in topics: Electroencephalography & Local field potential. The author has an hindex of 20, co-authored 41 publications receiving 3053 citations. Previous affiliations of Supratim Ray include Johns Hopkins University & Howard Hughes Medical Institute.
Papers
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Journal ArticleDOI
Different origins of gamma rhythm and high-gamma activity in macaque visual cortex.
Supratim Ray,John H. R. Maunsell +1 more
TL;DR: High-gamma (80–200 Hz) activity can be dissociated from gamma rhythms in the monkey cortex, and appears largely to reflect spiking activity in the vicinity of the electrode.
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Neural Correlates of High-Gamma Oscillations (60–200 Hz) in Macaque Local Field Potentials and Their Potential Implications in Electrocorticography
TL;DR: It is found that high-gamma power in the LFP was strongly correlated with the average firing rate recorded by the microelectrodes, both temporally and on a trial-by-trial basis, and ECoG high-Gamma activity was much more sensitive to increases in neuronal synchrony than firing rate.
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Differences in Gamma Frequencies across Visual Cortex Restrict Their Possible Use in Computation
Supratim Ray,John H. R. Maunsell +1 more
TL;DR: The results suggest that the gamma rhythm arises from local interactions between excitation and inhibition, and changes in stimulus contrast over time leads to a reliable gamma frequency modulation on a fast timescale.
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High-frequency gamma activity (80-150 Hz) is increased in human cortex during selective attention
TL;DR: There appears to be a strong link between activity in the high-gamma range (80-150 Hz) and selective attention and selective attention is correlated with increased activity in a frequency range that is significantly higher than what has been reported previously using EEG recordings.
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Do gamma oscillations play a role in cerebral cortex
Supratim Ray,John H. R. Maunsell +1 more
TL;DR: This work highlights several issues related to gamma rhythms, such as low and inconsistent power, its dependence on low-level stimulus features, problems due to conduction delays, and contamination due to spike-related activity that makes accurate estimation of gamma phase difficult.