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. 2019 Nov 5;6(6):ENEURO.0306-19.2019. doi: 10.1523/ENEURO.0306-19.2019

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Copyright © 2019 Henin et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license, which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.

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Figure 3. — Acoustic stimulation during nap sleep enhances both fast- and slow-spindle amplitudes but is not related to memory performance. A, Fast-spindle (12–15 Hz) and slow-spindle (9–12 Hz) amplitude at electrode Cz time locked to the negative DOWN state of all off-line detected SO events (t = 0). Both fast- and slow-spindle amplitude showed significant increases in amplitude in the stimulation (red) condition relative to sham (black) stimulation. B, Scatter plots of retention versus peak fast-spindle amplitude (left) and the number of VR improvements versus peak fast-spindle amplitude (right) across individuals in sham and stimulation conditions (no significant correlations in either task).