Differences in electroencephalogram power densities between genuine narcolepsy and secondary narcolepsy

Diagnosing narcolepsy is not always simple. Some patients secondarily show narcoleptic tetrad through irregular sleep patterns or psychotic diseases. The power densities of daytime electroencephalograms in genuine narcolepsy and secondary narcolepsy were analysed and compared. Electroencephalogram p...

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Bibliographic Details
Published in:Psychiatry and clinical neurosciences 2000-06, Vol.54 (3), p.326-327
Main Authors: Honma, Hiroshi, Kohsaka, Masako, Fukuda, Noriko, Kobayashi, Riko, Sakakibara, Satoshi, Koyama, Tsukasa
Format: Article
Language:English
Subjects:
Adolescent
Adult
Biological and medical sciences
Cerebral Cortex - physiopathology
Diagnosis, Differential
Electroencephalography
fast Fourier transform (FFT)
Female
Fourier Analysis
human leukocyte antigens
Humans
Male
Medical sciences
Middle Aged
narcolepsy
Narcolepsy - diagnosis
Narcolepsy - etiology
Narcolepsy - physiopathology
Nervous system involvement in other diseases. Miscellaneous
Neurology
Psychotic Disorders - complications
Psychotic Disorders - diagnosis
Psychotic Disorders - physiopathology
Signal Processing, Computer-Assisted
Sleep Deprivation - physiopathology
Sleep Stages - physiology
spectral analysis
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Summary:Diagnosing narcolepsy is not always simple. Some patients secondarily show narcoleptic tetrad through irregular sleep patterns or psychotic diseases. The power densities of daytime electroencephalograms in genuine narcolepsy and secondary narcolepsy were analysed and compared. Electroencephalogram power densities for a 6.5‐h period after waking in genuine narcoleptic patients were lower than those of secondary narcoleptic patients in the 11.0–12.5 Hz bands. Arousal levels may be lower in genuine narcoleptic patients than in secondary narcoleptic patients. Spectral analysis may be useful in clarifying differences between the two groups.
ISSN:1323-1316
1440-1819
DOI:10.1046/j.1440-1819.2000.00698.x