6533b828fe1ef96bd1288617
RESEARCH PRODUCT
Nonlinear EEG dynamics during sleep in depression and schizophrenia.
Joachim RöschkeJuergen FellKlaus Mannsubject
AdultMalePsychosisCorrelation dimensionHallucinationsmedia_common.quotation_subjectPoison controlSleep REMElectroencephalographyDevelopmental psychologyMental ProcessesSchizophrenic PsychologymedicineHumansmedia_commonSlow-wave sleepPsychiatric Status Rating ScalesDepressive Disordermedicine.diagnostic_testGeneral NeuroscienceCognitionElectroencephalographyGeneral MedicineMiddle Agedmedicine.diseaseSchizophreniaFemaleSchizophrenic PsychologySleep StagesPsychologySleepNeuroscienceVigilance (psychology)description
The article deals with the question, whether nonlinear analysis of the sleep EEG may give clues to understanding of disturbed information processing in psychiatric diseases. We point out how the nonlinear approach to EEG dynamics is motivated and review recent investigations concerning nonlinear dynamical properties of physiological systems. We present calculations of the correlation dimension D2 and the principal Lyapunov-exponent lambda 1 for sleep EEG data from 9 depressive and 11 schizophrenic inpatients compared to healthy controls. Combining the findings for D2 and lambda 1 our results point to altered nonlinear brain dynamics mainly during slow wave sleep in depression and during REM sleep in schizophrenia. Finally, possible interpretations of altered nonlinear EEG dynamics during sleep concerning disturbed information processing in depression and schizophrenia are discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-04-01 | The International journal of neuroscience |