title: [Segmental structure of the EEG alpha activity in adolescents with disorders of schizophrenic spectrum].
abstract: The EEG records of 39 healthy adolescents and 45 age-matched schizophrenic patients were analyzed. The broad-band EEG spectral analysis and segmental analysis of the alpha-activity revealed significant differences between the groups. Schizophrenics differed in a decreased spectral power for the alpha2 and betal frequency bands and increased power for the delta and theta bands. Also, in schizophrenic adolescents, quasi-stationary alpha-rhythm segments were longer, and within-segmental EEG amplitudes were higher than in the healthy subjects; the amplitude variability and the steepness of transitions between neighbor segments were increased. The results of the EEG segmental analysis suggest a disintegration of local cortical neuronal ensembles in schizophrenia.
authors: S V
authors: SV
authors: Borisov
authors: A Ia
authors: AIa
authors: Kaplan
authors: N L
authors: NL
authors: Gorbachevskaia
authors: I A
authors: IA
authors: Kozlova
mesh_terms: D000293:Adolescent; D000513:Alpha Rhythm; D002540:Cerebral Cortex / Q000503:physiopathology*; D002648:Child; D003700:Delta Rhythm; D006801:Humans; D008297:Male; D011618:Psychotic Disorders / Q000503:physiopathology*; D012559:Schizophrenia / Q000503:physiopathology*; D012569:Schizotypal Personality Disorder / Q000503:physiopathology*; D012815:Signal Processing, Computer-Assisted; D013826:Theta Rhythm