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Título: A new look at gamma? High- (>60 Hz) g-band activity in cortical networks: Function, mechanisms and impairment
Autor(es): Uhlhaas, Peter J.
Pipa, Gordon
Neuenschwander, Sergio
Wibral, Michael
Singer, Wolf
Palavras-chave: Oscillations;Synchrony;Gamma;Cognition;Psychiatry
Data do documento: 2011
Resumo: g-band oscillations are thought to play a crucial role in information processing in cortical networks. In addition to oscillatory activity between 30 and 60 Hz, current evidence from electro- and magnetoencephalography (EEG/MEG) and local-field potentials (LFPs) has consistently shown oscillations >60 Hz (high g-band) whose function and generating mechanisms are unclear. In the present paper, we summarize data that highlights the importance of high g-band activity for cortical computations through establishing correlations between the modulation of oscillations in the 60e200 Hz frequency and specific cognitive functions. Moreover, we will suggest that high g-band activity is impaired in neuropsychiatric disorders, such as schizophrenia and epilepsy. In the final part of the paper, we will review physiological mechanisms underlying the generation of high g-band oscillations and discuss the functional implications of low vs. high g-band activity patterns in cortical networks.
ISSN: 0079-6107
Aparece nas coleções:ICe - Artigos publicados em periódicos

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