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  EEG phase patterns reflect the selectivity of neural firing

Ng, B., Logothetis, N., & Kayser, C. (2013). EEG phase patterns reflect the selectivity of neural firing. Cerebral Cortex, 23(2), 389-398. doi:10.1093/cercor/bhs031.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-B4F6-D Version Permalink: http://hdl.handle.net/21.11116/0000-0006-CA43-B
Genre: Journal Article

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Ng, BS1, 2, 3, Author              
Logothetis, NK1, 4, Author              
Kayser, C1, 4, Author              
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              
2Former Research Group Network Imaging, Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_2528697              
3Research Group Neural Population Imaging, Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497807              
4Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              

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 Abstract: Oscillations are pervasive in encephalographic signals and supposedly reflect cognitive processes and sensory representations. While the relation between oscillation amplitude (power) and sensory–cognitive variables has been extensively studied, recent work reveals that the dynamic oscillation signature (phase pattern) can carry information about such processes to a greater degree than amplitude. To elucidate the neural correlates of oscillatory phase patterns, we compared the stimulus selectivity of neural firing rates and auditory-driven electroencephalogram (EEG) oscillations. We employed the same naturalistic sound stimuli in 2 experiments, one recording scalp EEGs in humans and one recording intracortical local field potentials (LFPs) and single neurons in macaque auditory cortex. Using stimulus decoding techniques, we show that stimulus selective firing patterns imprint on the phase rather than the amplitude of slow (theta band) oscillations in LFPs and EEG. In particular, we find that stimuli which can be discriminated by firing rates can also be discriminated by phase patterns but not by oscillation amplitude and that stimulus-specific phase patterns also persist in the absence of increases of oscillation power. These findings support a neural basis for stimulus selective and entrained EEG phase patterns and reveal a level of interrelation between encephalographic signals and neural firing beyond simple amplitude covariations in both signals.

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 Dates: 2013-02
 Publication Status: Published in print
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 Identifiers: DOI: 10.1093/cercor/bhs031
BibTex Citekey: NgLK2012
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Title: Cerebral Cortex
Source Genre: Journal
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Publ. Info: New York, NY : Oxford University Press
Pages: - Volume / Issue: 23 (2) Sequence Number: - Start / End Page: 389 - 398 Identifier: ISSN: 1047-3211
CoNE: https://pure.mpg.de/cone/journals/resource/954925592440