The NEMAR portal for electromagnetic human neuroimaging data is being built to support sharing and in-depth visualization and analysis of de-identified human neuroelectromagnetic (NEM) brain data – scalp EEG, its magnetic counterpart MEG, and intracranial iEEG and ECoG data. Data available via NEMAR reside on the OpenNeuro archive in BIDS formats.
Using the NEMAR archive, users may first search for and select available data and then either download or analyze it directly via the Neuroscience Gateway, which offers a variety of neuroscience tool environments (including MATLAB/Octave, EEGLAB, Freesurfer, R, Python, PyNN, Tensorflow) for data processing on the XSEDE (Extreme Science and Engineering Discovery Environment) high-performance computing network.
NEMAR encourages the use of BIDS-approved Hierarchical Event Descriptor (HED) annotation to document the precise nature of experiment events. HEDTools for creating HED annotations using the new HED-3G and to select data time-aligned to specified HED tag categories are now integrated into the NSG tool environment for Matlab/EEGLAB.