DOI: 10.6084/m9.figshare.16950856
title: DeGennaro_SleepTalking

description: Dream EEG and Mentation (DREAM) dataset ======================================= <br> <br> Dataset information ------------------- <br> - Common name: Sleep Talking - Full name: DeGennaro_SleepTalking - Authors: Luigi De Gennaro, Serena Scarpelli - Location: Italy - Year: N/A - Set ID: 10 - Amendment: 0 - Corresponding author ID: 8 <br> Previous publications: none <br> Correspondence: luigi.degennaro@uniroma1.it <br> <br> Metadata -------- <br> - Key ID: 11 - Date entered: 2023-03-10T10:50:38+00:00 - Number of samples: 22 - Number of subjects: 12 - Proportion REM: 23% - Proportion N1: 5% - Proportion N2: 73% - Proportion W: 0% - Proportion experience: 50% - Proportion no-experience: 41% - Proportion healthy: 0% - Provoked awakening: No - Time of awakening: Morning - Form of response: Categorical - Date approved: 2023-03-10T10:51:40+00:00 <br> <br> How to decode data files ------------------------ <br> N/A <br> <br> ### Treatment group codes ### <br> Participants are Sleep Talkers <br> <br> Experimental description ------------------------ <br> We carried out a three-phases selection procedure (Figure S1), including an online survey to rule out other sleep or psychiatric disorders and an at-home monitoring to objectively verify presence and frequency of the phenomenon prior in laboratory experimental recording (see Supplemental materials for a detailed description of the survey and participants’ selection criteria). Within a total of 1309 questionnaires, N = 155 (age range 18-69, mean age 26.32 ± 7.84; F 107) participants declared themselves as Highly frequent STs. From this sample, we selected N = 50 Highly frequent STs for home monitoring. During the home monitoring week, the participants produced 766 vocalizations (385 Non-verbal STs and 381 Verbal STs, 213 of which non-intelligible, for a total of 607 and 20414 intelligible characters) and 12 subjects (age range 19-30, 1 left-handed, 2 ambidextrous) were suitable for EEG recordings. <br> The participants signed informed consent before participation in the study. The study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Review Board of the Department of Psychology of the Sapienza University of Rome (protocol number: 0001288). <br> Language: Italian <br> <br> ### DREAM categorization procedure ### <br> 2 = Experience with content recall (subjects report at least one dream report); 1 = Experience without content recall (in the dream diary subjects report the feeling of having had a dream but he/she does not remember the content), and 0 = No experience (subject report no recall or in the dream diary "I don't know" response without any clear feeling of having had a dream) <br> <br> Technical details ----------------- <br> We tested the 12 participants for at least two consecutive nights of undisturbed sleep: an adaptation night, to avoid a possible first night effect on the macro- and microstructural characteristics of sleep; one or more experimental nights, during which we pursued the conditions of Verbal ST (one or more episodes of ST with verbal vocalizations, whether intelligible or not) and Non-verbal ST (any grumbling, moaning, laughing, crying, long sigh). <br> The experimental sessions started at 7 p.m. After completing the EEG headset assembly, the participants were placed in an acoustically isolated, temperature-controlled, audio/video-monitored bedroom for the vPSG recording. <br> We guaranteed at least 8 hours of bedtime. The final awakenings were carried out at the end of the experimental night and necessarily after about 7 hours of undisturbed sleep. Upon the final awakening, the participants filled out the sleep- and dream log. <br> <br> ### Data acquisition ### <br> We acquired the PSG signal through a 32-channel system (BrainAmp MR Plus System, Brain Products GmbH, Gilching, Munich) and the dedicated BrainVision Recorder software for online visualization. The data relative to the cortical activity of the subjects (EEG) were acquired from the scalp through 28 cortical derivations (Fp1, F3, F7, Fc1, Fp2, F4, F8, Fc2, Fc5, C3, T7, Cp1, Fc6, C4, T8, Cp2, Cp5, P3, P7, O1, Cp6, P4, P8, O2, Fz, Cz, Pz, Oz), positioned according to the international 10-20 system, with reference on averaged mastoids (A1, A2), and ocular and muscular activity were recorded by EMG and EOG electrodes. The impedance of the electrodes was kept below 5 kOhms. <br> PSG signals were recorded at a sampling rate of 250 Hz. EEG signals were high pass filtered with time constant of 1-s and low pass filtered at 70 Hz. Possible interference from the electricity network was filtered by a notch filter at 50 Hz (± 5Hz). The filters were implemented as phase shift-free Butterworth filters. <br> <br> ### Data preprocessing ### <br> none <br> <br>