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Anterior-Posterior Relationships of EEG in Photosensitive Subjects: Coherence and Cross-Phase-Spectral Analysis
- Source :
- Psychiatry and Clinical Neurosciences. 43:651-663
- Publication Year :
- 1989
- Publisher :
- Wiley, 1989.
-
Abstract
- Coherence and cross-phase-spectral analysis of EEG were applied to photo-sensitive subjects to investigate the mechanism of the generalization of photo-induced paroxysms. Coherence values were high between frontal (F) and central (C) in resting records and between F-C in EEGs revealing harmonic responses, where the coherence values of F-O (occipital) were also high, and the waves of F preceded those of O. In cases of occipital-localized 3/6 Hz (poly) spike-waves, discharges of O preceded those of F. During the stage of generalized paroxysms, discharges were highly cohered between all electrodes. Discharges of F preceded those of O, and appeared to play as a generator. Two conditions with clinical symptoms had higher frequencies (greater than or equal to 12 Hz) and shorter time lags (less than or equal to 5 msec) than conditions without symptoms.
- Subjects :
- Adult
Male
Adolescent
Electrodiagnosis
Phase (waves)
Electroencephalography
Nuclear magnetic resonance
Phase spectrum
medicine
Humans
Spectral analysis
Anterior posterior
Child
Brain Mapping
medicine.diagnostic_test
Photic epilepsy
General Neuroscience
Signal Processing, Computer-Assisted
General Medicine
Coherence (statistics)
Middle Aged
Frontal Lobe
Psychiatry and Mental health
Neurology
Child, Preschool
Evoked Potentials, Visual
Female
Epilepsies, Partial
Occipital Lobe
Neurology (clinical)
Psychology
Neuroscience
Photic Stimulation
Subjects
Details
- ISSN :
- 14401819 and 13231316
- Volume :
- 43
- Database :
- OpenAIRE
- Journal :
- Psychiatry and Clinical Neurosciences
- Accession number :
- edsair.doi.dedup.....512a19609e3455ada8ee8008bb23488a