Sleep/wake movement velocities, trajectories and micro-arousals during maturation in rats

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• 作者：Gideon Gradwohl ; Nadja Olini ; Reto Huber
• 关键词：State dynamic ; EEG ; Maturation ; Lobes ; Rat
• 刊名：BMC Neuroscience
• 出版年：2017
• 出版时间：December 2017
• 年：2017
• 卷：18
• 期：1
• 全文大小：1922KB
• 刊物主题：Neurosciences; Neurobiology; Animal Models;
• 出版者：BioMed Central
• ISSN：1471-2202
• 卷排序：18

文摘

BackgroundSleep is regulated by two main processes. The circadian process provides a 24-h rhythm and the homeostatic process reflects sleep pressure, which increases in the course of wakefulness and decreases during sleep. Both of these processes undergo major changes during development. For example, sleep homeostasis, measured by means of electroencephalogram (EEG) slow-wave activity (SWA, EEG power between 0.5 and 4.5 Hz), peaks around puberty and decreases during adolescence. In humans and rats these changes have been related to cortical maturation. We aimed to explore whether additional parameters as state dynamic (dynamic of sleep/wake behavior) parameters of movement velocity, trajectories and micro-arousals provide markers of rat maturation. The state dynamics reflect the stability of sleep within a specific sleep stage. We applied a state space technique (SST), a quantitative and unbiased method, based on frequency band ratios of the EEG to analyze the development of different sleep/wake states and state dynamics between vigilance states. EEG of recording electrodes at the frontal and parietal lobe were analyzed using conventional scoring criteria and SST.