| Cortical gamma responses: Searching high and low. | |
| | |
MedLine Citation:
|
PMID: 21081143 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
In this paper, a brief, preliminary attempt is made to frame a scientific debate about how functional responses at gamma frequencies in electrophysiological recordings (EEG, MEG, ECoG, and LFP) should be classified and interpreted. In general, are all gamma responses the same, or should they be divided into different classes according to criteria such as their spectral characteristics (frequency range and/or shape), their spatial-temporal patterns of occurrence, and/or their responsiveness under different task conditions? In particular, are the responses observed in intracranial EEG at a broad range of "high gamma" frequencies (~60-200Hz) different from gamma responses observed at lower frequencies (~30-80Hz), typically in narrower bands? And if they are different, how should they be interpreted? Does the broad spectral shape of high gamma responses arise from the summation of many different narrow-band oscillations, or does it reflect something completely different? If we are not sure, should we refer to high gamma activity as oscillations? A variety of theories have posited a mechanistic role for gamma activity in cortical function, often assuming narrow-band oscillations. These theories continue to influence the design of experiments and the interpretation of their results. Do these theories apply to all electrophysiological responses at gamma frequencies? Although no definitive answers to these questions are immediately anticipated, this paper will attempt to review the rationale for why they are worth asking and to point to some of the possible answers that have been proposed. |
| | |
Authors:
|
Nathan E Crone; Anna Korzeniewska; Piotr J Franaszczuk |
Related Documents
:
|
18061683 - Assessing transient cross-frequency coupling in eeg data. 15754873 - Use of principal component analysis in the frequency domain for mapping electroencephal... 2706703 - Adaptation to shift work--experimental approaches with reduced masking effects. |
Publication Detail:
|
Type: Journal Article Date: 2010-11-23 |
Journal Detail:
|
Title: International journal of psychophysiology : official journal of the International Organization of Psychophysiology Volume: 79 ISSN: 1872-7697 ISO Abbreviation: Int J Psychophysiol Publication Date: 2011 Jan |
Date Detail:
|
Created Date: 2011-02-04 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8406214 Medline TA: Int J Psychophysiol Country: Netherlands |
Other Details:
|
Languages: eng Pagination: 9-15 Citation Subset: IM |
Copyright Information:
|
Copyright © 2010 Elsevier B.V. All rights reserved. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: How much cytoplasm can a bacterial genome control?
Next Document: Effect of donor CTLA-4 alleles and haplotypes on graft-versus-host disease occurrence in Tunisian pa...