DOI: 10.6084/m9.figshare.14500563
title: DeGennaro_OlderAdults

description: Dream EEG and Mentation (DREAM) dataset ======================================= <br> <br> Dataset information ------------------- <br> - Common name: Older adults - Full name: DeGennaro_older_adults - Authors: Luigi De Gennaro, Serena Scarpelli - Location: N/A - Year: N/A - Set ID: 12 - Amendment: 0 - Corresponding author ID: 9 <br> Previous publications: - Scarpelli, S., D’Atri, A., Bartolacci, C., Gorgoni, M., Mangiaruga, A., Ferrara, M., & De Gennaro, L. (2020). Dream recall upon awakening from non-rapid eye movement sleep in older adults: electrophysiological pattern and qualitative features. Brain sciences, 10(6), 343. - Scarpelli, S., D'Atri, A., Bartolacci, C., Mangiaruga, A., Gorgoni, M., & De Gennaro, L. (2019). Oscillatory EEG activity during REM sleep in elderly people predicts subsequent dream recall after awakenings. Frontiers in neurology, 10, 985. <br> Correspondence: serena.scarpelli@uniroma1.it <br> <br> Metadata -------- <br> - Key ID: 13 - Date entered: 2023-03-13T07:20:41+00:00 - Number of samples: 40 - Number of subjects: 40 - Proportion REM: 50% - Proportion N1: 0% - Proportion N2: 50% - Proportion W: 0% - Proportion experience: 45% - Proportion no-experience: 55% - Proportion healthy: 100% - Provoked awakening: Yes - Time of awakening: Morning - Form of response: Free - Date approved: 2023-03-13T07:26:59+00:00 <br> <br> How to decode data files ------------------------ <br> In this dataset we report the PSG recording of each subject awakened upon an undisturbed night. <br> Please note that we reported the whole night or just the last part of the night. Dream recall was collected after the last morning awakening. <br> <br> ### Treatment group codes ### <br> N/A <br> <br> Experimental description ------------------------ <br> Forty subjects were involved in the protocol. The following inclusion criteria were considered for all subjects: the absence of psychiatric or neurological disorders and cognitive impairment; the absence of sleep disturbances and/or the condition of excessive daytime sleepiness; the absence of other relevant medical conditions and obesity; the absence of alcohol and other substance addiction; regular sleep-wake rhythms. To ascertain the eligibility for the study enrollment, a clinical and anamnestic interview was administered at the recruitment phase. <br> All the participants signed informed consent before the experimental session. The study protocol (#1128/2016) was approved on 1 December 2016 by the Institutional Ethics Committee of the Department of Psychology of the “Sapienza” University of Rome according to the Declaration of Helsinki. <br> Before the sleep recording, all the subjects were trained to consider all types of mental sleep activity as dream experience (both oneiric- and thought-like dreams) and how to provide their dream report upon the morning awakening. The participants were awakened in the morning by calling out their first name and were immediately invited to verbally record “everything that was going through your mind during the sleep period”, providing as many details as possible. Subjects who reported at least one dream experience were defined as RECallers, while subjects who did not report any DR were defined as Non-RECallers. Dream categories were reported in the csv file. <br> Please note that no subject reported white dream in this dataset. <br> The study was conducted in Italian language. <br> <br> ### DREAM categorization procedure ### <br> N/A <br> <br> Technical details ----------------- <br> N/A <br> <br> ### Data acquisition ### <br> All the PSG data were recorded by using the Micromed system plus a digital polygraph. The 19 unipolar EEG scalp derivations (Ag/AgCl electrodes) were placed following the international 10–20 system (F1, F2, F3, F4, F7, F8, Fz, C3, C4, Cz, P3, P4, Pz, O1, O2, T3, T4, T5, and T6), and the A1 and A2 from mastoids were acquired with a sampling frequency of 256 Hz and a bandpass filtered at 0.5–30 Hz. Additionally, a notch filter was applied (50 Hz). The ground electrode was placed at the frontopolar location (Fpz). In addition, two bipolar channel, electrooculogram (EOG) and submental electromyogram (EMG), signals were recorded. EOG electrodes were placed about 1 cm from the medial and lateral canthi of the dominant eye. Bedtime was between 10:00 PM and 12:00 AM, while the morning awakening was between 5:00 and 7:00 AM depending on each participant’s usual schedule. All the subjects were awakened from stage 2 NREM sleep or REM sleep. The researcher checked the PSG and decided to wake the subject up when no stage shift over the last 5 min of sleep had occurred. <br> <br> ### Data preprocessing ### <br> N/A