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. 2020 Jan 21;13:1446. doi: 10.3389/fnins.2019.01446

FIGURE 2.

FIGURE 2

A rocking bed was used to provide vestibular stimulation at three levels of intensity. (A) Picture of the Somnomat rocking bed (here not located in the sleep laboratory) performing a side-to-side motion along a pendulum trajectory. (B) Participants were divided in a group having a nap opportunity with low intensity stimulation (n = 10) and a group having a nap opportunity with high intensity stimulation (n = 12), all participants additionally had one control and medium intensity stimulation nap opportunity. Recorded sound of the bed was played back during the control condition.

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