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The Kleine-Levin syndrome: Clinical and quantitative electroencephalographic findings in two patients

The Kleine-Levin syndrome: Clinical and quantitative electroencephalographic findings in two patients

Integrative Psychiatry 10(4): 202-208

ISSN/ISBN: 0735-3847

Two patients with Kleine-Levin syndrome (recurrent hypersomnia, ICSD 780.54-2) were investigated in regard to psychopathology, wake-EEG, and polysomnography during the somnolent episode as well as during the asymptomatic interval. Two quantitative EEG parameters were applied: the correlation exponent of Grassberger-Procaccia, and the complexity of Hjorth's global frequency analysis. Compared with two age- and sex-matched healthy controls we found higher values of the correlation exponent during the asymptomatic interval. Furthermore, Hjorth's complexity decreased significantly in parallel with the appearance of psychopathological symptoms. We interpreted these findings as an expression of a neurodevelopmental disorder with a failure to hold a stable rhythm, due to disorganized oscillations of neural networks.

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Accession: 009534169

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