Closed and Open Eyes EEG Data

Resumen

Seven volunteers agreed to participate in the study. Their mean age was 29.67 years (range 24 – 56 years). The participants indicated that they did not have hearing or visual impairments.  Gold cup electrodes were O1 and O2 placed following the 10-20 International System for electrode placement and attached to the subject scalp using a conductive paste. Electrode-skin impedances were checked to be below 15 kΩ at all electrodes. The reference and ground electrodes were placed in the Fp2 and A2 positions, respectively, where the absence of hair facilitates their placement, thus optimizing the setup time and EEG signal quality.  The signals were captured using the hardware presented in [1], and the signal processing algorithms were executed on a PC using Matlab, allowing us to repeat the simulations offline with different parameters. During the experimental sessions, the signals from the two channels were recorded for a total duration of 10 minutes per participant. Specifically, the recording process involved 60 seconds of signal acquisition while the participant had their eyes open, followed by another 60 seconds of signal acquisition while the participant had their eyes closed. To indicate the transition between the two eye states, a sound alert was played for the participant. Once the electrodes had been placed and the impedance checked to be below 15 kΩ, the recordings started without individual calibration for any of the participants. All the experiments were conducted in a sound-attenuated and controlled environment. Participants were seated in a comfortable chair and asked to be relaxed and focused on the task, trying to avoid any distractions or external stimuli. To mimic real-life conditions, the participants were allowed to freely move their gaze during the eye-open tasks, without the requirement of maintaining fixation on a specific point. To reduce possible artifacts, participants were asked not to move or speak during the experiments. After each recording session, data for each subject were visually inspected and the recording was repeated if any of them was corrupted by a high level of noise or artifacts. Data is organized in a folder for each subject (S1, S2, S3, etc.). Inside each subject folder, another folder named 'PP' contains the EEG recordings in a .csv file.  Each .csv file contains 3 columns: timestamp, O1 channel and O2 channel.   [1] Laport F, Dapena A, Castro PM, Iglesias DI, Vazquez-Araujo FJ. Eye State Detection Using Frequency Features from 1 or 2-Channel EEG. Int J Neural Syst. 2023 Dec;33(12):2350062. doi: 10.1142/S0129065723500624. Epub 2023 Oct 12. PMID: 37822240