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. 2017 Apr 13;11:59. doi: 10.3389/fnbeh.2017.00059

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Copyright © 2017 Rembado, Zanos and Fetz.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Sleep architecture of monkey. (A) One night of continuous recording of sleep from 7 pm to 7 am with Neurochip2. From top to bottom: head acceleration, eye movements, power (dB) for different frequency bands: Delta (3–5 Hz), Beta (15–35 Hz), Gamma (70–100 Hz). Each plot shows the average over 30-s bins. The arrows point at non-rapid-eye-movement (NREM) sleep stages (NR) characterized by a relative higher contribution of delta oscillations to ECoG signals with a reduction in eye movements (*). (B) Example of 2-s epoch polygraph records showing, from top to bottom, NREM, rapid eye movement (REM) and Wake stage in the monkey.