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Stimulus- and frequency-specific oscillatory mass responses to visual stimulation in man.
De Carli, F; Narici, L; Canovaro, P; Carozzo, S; Agazzi, E; Sannita, W G.
Afiliação
  • De Carli F; Department of Motor Science and Rehabilitation, University of Genova, Genova, Italy.
Clin Electroencephalogr ; 32(3): 145-51, 2001 Jul.
Article em En | MEDLINE | ID: mdl-11512378
ABSTRACT
Oscillatory mass responses centered at about 20-35 Hz or 100-120 Hz occur (after contrast or luminance visual stimulation, respectively) in the retina and cortex of animals and man and are recorded by electrical or magnetic methods. These oscillatory events reflect stimulus-related uni/multicellular oscillations of the firing rate/membrane potential and result from synchronization of neuronal assemblies selectively responding to the stimulus characteristics. Methodological problems in the study of these events derive from the contiguity in frequency between the ERG or VEP and the oscillatory responses and from the need to reliably define oscillatory events in time and frequency. Two methods (time-frequency analysis by matching pursuit and locking index) have been implemented to approach this issue. Theory and application are reviewed.
Assuntos
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Base de dados: MEDLINE Assunto principal: Estimulação Luminosa / Retina / Córtex Visual / Potenciais Evocados Visuais Idioma: En Ano de publicação: 2001 Tipo de documento: Article
Buscar no Google
Base de dados: MEDLINE Assunto principal: Estimulação Luminosa / Retina / Córtex Visual / Potenciais Evocados Visuais Idioma: En Ano de publicação: 2001 Tipo de documento: Article