title: Spectral F-test power evaluation in the EEG during intermittent photic stimulation.
abstract: Intermittent photic stimulation (IPS) is an important functional test, which can induce the photic driving in the electroencephalogram (EEG). It is capable of enhancing latent oscillations manifestations not present in the resting EEG. However, for adequate quantitative evaluation of the photic driving, these changes should be assessed on a statistical basis. With this aim, the sampling distribution of spectral F test was investigated. On this basis, confidence limits of the SFT-estimate could be obtained for different practical situations, in which the signal-to-noise ratio and the number of epochs used in the estimation may vary. The technique was applied to the EEG of 10 normal subjects during IPS, and allowed detecting responses not only at the fundamental IPS frequency but also at higher harmonics. It also permitted to assess the strength of the photic driving responses and to compare them in different derivations and in different subjects.
authors.affiliation: Programa de Engenharia Biomédica, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Antonio Mauricio F L Miranda
authors.initials: AM
authors.lastname: de Sá
authors.forename: Mauricio
authors.initials: M
authors.lastname: Cagy
authors.forename: Vladimir V
authors.initials: VV
authors.lastname: Lazarev
authors.forename: Antonio Fernando C
authors.initials: AF
authors.lastname: Infantosi
mesh_terms: D000293:Adolescent; D002540:Cerebral Cortex / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D004569:Electroencephalography / Q000379:methods*; D006801:Humans; D008959:Models, Neurological; D010775:Photic Stimulation / Q000379:methods*; D015203:Reproducibility of Results; D012146:Rest / Q000502:physiology*; D013997:Time Factors