Neuroimaging of Healthy Young Adults

Eyes-open resting-state data were collected in a cohort of 19 healthy young adults (age 28 ± 6 years, 5 males) and were previously used in other studies from our group [11 (link),12 (link),49 (link)]. Ethical approval was granted by the Ethics Committee of ETH Zurich; informed consent was obtained from all participants and the experiment was performed in accordance with the relevant guidelines and regulations. For each participant, we recorded hdEEG signals for 5 min at 1000 Hz sampling rate using a 256-channel HydroCel Geodesic Sensor Net by Electrical Geodesics (Eugene, OR, USA). Electromyograms and vertical and horizontal electrooculograms (EOG) were collected in addition to the hdEEG signals. Positions of the EEG sensors and of three landmarks (nasion, left and right preauricular points) were localized using a Geodesic Photogrammetry System (GPS) [42 (link)]. In a separate session, we acquired a T1-weighted whole-head anatomical image using a Philips Ingenia 3T MR scanner (Best, The Netherlands) with a turbo field echo sequence. Scanning parameters were: TR = 8.25 ms, TE = 3.8 ms, flip angle = 8°, voxel size = 1 mm³ isotropic.