EEG coherence and power spectra during REM sleep related to melatonin intake in mild-to-moderate Alzheimer’s disease: a pilot study
| Autor: | Marisela Hernández-González, Ignacio Ramírez-Salado, Miguel Angel Guevara, Manuel Alejandro Cruz-Aguilar, Ana Paula Rivera-García |
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| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
First episode medicine.medical_specialty medicine.diagnostic_test business.industry General Neuroscience Eye movement General Medicine Electroencephalography Placebo Sleep in non-human animals Melatonin 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Endocrinology Internal medicine medicine GABAergic Sleep onset business 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | International Journal of Neuroscience. 133:441-449 |
| ISSN: | 1543-5245 0020-7454 |
| Popis: | It has been reported that melatonin diminishes rapid eye movement (REM) sleep latency in patients with Alzheimer's disease (AD). Pharmacological studies suggest that melatonin promotes prompt sleep installation through interaction with GABA receptors, and that it is associated with acute suppression of neural electrical activity. Nevertheless, melatonin's effects on electroencephalographic (EEG) activity related to REM sleep onset in AD patients have not been analyzed. Thus, in this pilot study we analyzed the effects of melatonin on EEG activity during the first episode of REM sleep in eight patients treated with 5-mg of fast-release melatonin. During a single-blind, placebo-controlled study, polysomnographic recordings were obtained from frontal, central, temporal, and occipital scalp derivations. REM sleep latency, as well as the relative power (RP) and EEG coherences of six EEG bands, were compared between the placebo and melatonin conditions. Results showed that melatonin intake in AD patients decreased REM sleep onset, and that this was associated with lower RP and coherence of the β and γ EEG bands. The possibility that the inhibitory GABAergic pathways related to REM sleep generation are well-preserved in mild-to-moderate AD is discussed. We conclude that the short REM sleep onset related to melatonin intake in AD patients is associated with a significant decrease in both RP and EEG coherence, mainly in the fast frequencies. |
| Databáze: | OpenAIRE |
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