This dataset has been replaced by the one found at: 10.17635/lancaster/researchdata/630

This dataset contains experimental data gathered from 45 human participants. The signals recorded are EEG, fNIRS, ECG, respiration, room temperature, forehead temperature and blood flow (using laser Doppler flowmetry). In addition to the Matlab files, there is a png file showing the EEG fNIRS layout.

The study protocols were approved by the Commission of the Republic of Slovenia for Medical Ethics or by the Faculty of Science and Technology Research Ethics Committee (FSTREC) at Lancaster University. Data were recorded at the Neurological Clinic, Ljubljana, Slovenia (22 participants, 10 male and 12 female, of which 12 are in the younger group (6 female and 6 male) and 10 are in the older group (6 female and 4 male)), or at the Nonlinear and Biomedical Physics Lab in Physics Department, Lancaster University, Lancaster, UK (23 participants, 9 male and 14 female, of which 9 are in the younger group (5 female and 4 male) and 14 are in the older group (9 female and 5 male)). Each participant sat comfortably in an armchair with their eyes open. The electroencephalogram (EEG) was recorded at 1kHz using a 16 channel system (V-Amp, Brain Products, Germany) and the functional near-infrared spectroscopy (fNIRS) operated at 31.25Hz with an 8 source/8 detector LED system (NIRScout, NIRx, Germany). An electrocardiogram (ECG) system with electrodes placed on each shoulder and the lower left rib acquired the heart rate, while a respiration belt wrapped around the subject’s chest recorded the respiration rate. The ECG, respiration effort, room temperature, and forehead temperature signals were recorded using Cardio Signal conditioning unit (IJS, Slovenia) at 1.2 KHz sampling frequency. Laser Doppler flowmetry (LDF, Moor Instruments, Axminster, Devon) was used to measure the blood flow to the left and right of the forehead. Each of the two LDF signals are sampled by 40 Hz . All signals were recorded simultaneously for around 30 minutes. All of the signals have been cut down to 25min continuous intervals. Same segments were selected for all simultaneously recorded signals, and usually the last 25 min were considered.

In each MatLab file there are 45 cells. Each cell corresponds to a participant. Participants in cells 1-21 are younger (20-39 years old), while participants in cells 22-45 are older (56-77 years old). One older participant lacks ECG, respiration, blood flow or room temperature signals.