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Spectral electroencephalography profile of rapid eye movement sleep at sleep onset in narcolepsy type 1.

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Title: Spectral electroencephalography profile of rapid eye movement sleep at sleep onset in narcolepsy type 1.
Authors: Pizza, F., Ferri, R., Vandi, S., Rundo, F., Iloti, M., Neccia, G., Plazzi, G.
Source: European Journal of Neurology. Feb2017, Vol. 24 Issue 2, p334-340. 7p.
Subjects: Narcolepsy, Rapid eye movement sleep, Electroencephalography, Wakefulness, Sympathetic nervous system physiology, Diagnosis
Abstract: Background and purpose The sleep-onset rapid eye movement ( REM) period ( SOREMP), the hallmark of narcolepsy, may be a specific state and not the simple anticipation of REM sleep. Methods We analyzed the electroencephalographic spectral content in untreated patients with narcolepsy type 1 ( NT1) during the sleep-onset period ( SOP) and during nocturnal REM sleep in two consecutive nocturnal recordings from 31 patients with NT1 (mean age 34 ± 15 years, 18 males) and a single nocturnal recording from 36 controls (mean age 38 ± 13 years, 21 males). The SOP was defined as the first 10 min starting at the beginning of the first epoch of any sleep stage, and further divided into two consecutive 5-min periods ( SOP-1 and SOP-2); 1 min of artifact-free quiet wakefulness after lights-off was identified as well as 5 min of REM sleep in the middle of the night and another 5 min during the last REM sleep period. Electroencephalographic spectral analysis was performed using the C3/A2 channel. Results The SOP-1 and, more strikingly, SOP-2 had significantly less delta and sigma activity in patients with NT1 in the SOREMP condition versus both controls and patients with NT1 without SOREMP. SOP-2 also showed less theta and alpha activity. Conversely, sigma and beta activity were more represented during SOREMP compared with the nocturnal REM period in patients with NT1. Conclusions The analysis of the SOP supports the concept that SOREMP is a different state compared with both nocturnal REM sleep and non- REM sleep onset. [ABSTRACT FROM AUTHOR]
Copyright of European Journal of Neurology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Spectral electroencephalography profile of rapid eye movement sleep at sleep onset in narcolepsy type 1.
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  Data: <searchLink fieldCode="AR" term="%22Pizza%2C+F%2E%22">Pizza, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Ferri%2C+R%2E%22">Ferri, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Vandi%2C+S%2E%22">Vandi, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Rundo%2C+F%2E%22">Rundo, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Iloti%2C+M%2E%22">Iloti, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Neccia%2C+G%2E%22">Neccia, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Plazzi%2C+G%2E%22">Plazzi, G.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22European+Journal+of+Neurology%22">European Journal of Neurology</searchLink>. Feb2017, Vol. 24 Issue 2, p334-340. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Narcolepsy%22">Narcolepsy</searchLink><br /><searchLink fieldCode="DE" term="%22Rapid+eye+movement+sleep%22">Rapid eye movement sleep</searchLink><br /><searchLink fieldCode="DE" term="%22Electroencephalography%22">Electroencephalography</searchLink><br /><searchLink fieldCode="DE" term="%22Wakefulness%22">Wakefulness</searchLink><br /><searchLink fieldCode="DE" term="%22Sympathetic+nervous+system+physiology%22">Sympathetic nervous system physiology</searchLink><br /><searchLink fieldCode="DE" term="%22Diagnosis%22">Diagnosis</searchLink>
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  Label: Abstract
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  Data: Background and purpose The sleep-onset rapid eye movement ( REM) period ( SOREMP), the hallmark of narcolepsy, may be a specific state and not the simple anticipation of REM sleep. Methods We analyzed the electroencephalographic spectral content in untreated patients with narcolepsy type 1 ( NT1) during the sleep-onset period ( SOP) and during nocturnal REM sleep in two consecutive nocturnal recordings from 31 patients with NT1 (mean age 34 ± 15 years, 18 males) and a single nocturnal recording from 36 controls (mean age 38 ± 13 years, 21 males). The SOP was defined as the first 10 min starting at the beginning of the first epoch of any sleep stage, and further divided into two consecutive 5-min periods ( SOP-1 and SOP-2); 1 min of artifact-free quiet wakefulness after lights-off was identified as well as 5 min of REM sleep in the middle of the night and another 5 min during the last REM sleep period. Electroencephalographic spectral analysis was performed using the C3/A2 channel. Results The SOP-1 and, more strikingly, SOP-2 had significantly less delta and sigma activity in patients with NT1 in the SOREMP condition versus both controls and patients with NT1 without SOREMP. SOP-2 also showed less theta and alpha activity. Conversely, sigma and beta activity were more represented during SOREMP compared with the nocturnal REM period in patients with NT1. Conclusions The analysis of the SOP supports the concept that SOREMP is a different state compared with both nocturnal REM sleep and non- REM sleep onset. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of European Journal of Neurology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Feb2017
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