[Spectral band analysis in the study of attentional processes: interest of numerical filtrage by bands].
This is a study of relationships between cerebral events and visual attentional processes in 28 healthy adult volunteers by means of a spectral analysis method described in this paper. The recorded data make it possible to study the EEG, standard VEPs, VEPs during attention and visual 'emitted' potentials when stimuli were expected but absent. Compared with the methods of summation and unitary analysis, spectral analysis by bands appears very interesting, especially for the study of 'emitted' potentials because it avoids the subjectivity of operators and reduces the number of stimuli. The results obtained show the interest of this simple, reliable and effective method for the detection and objectivation of evoked activities with only a very few (10) stimuli.
D000328:Adult; D001288:Attention / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology; D004569:Electroencephalography / Q000379:methods*; D005071:Evoked Potentials; D006801:Humans; D014796:Visual Perception / Q000502:physiology
Contribution de l'analyse fréquentielle par bandes à l'étude des processus attentionnele: intérêt du filtrage numérique par bandes.