This project is approved by the OPUS 22+LAP/Weave program, which is dedicated to research projects carried out in international bilateral or trilateral cooperation. In this project, named Combining functional near-infrared spectroscopy and magnetoencephalography based on optically pumped magnetometers for advanced mapping of neurovascular coupling, three organizations from Poland, Germany, and Slovenia are collaborating. The Polish partner Institute of Biocybernetics and Biomedical Engineering (IBIB) is funded by the National Science Centre (NCN). The German partner Physikalisch-Technische Bundesanstalt (PTB) is funded by the German Research Foundation (DFG), and the Slovenian partner University of Ljubljana (UL) by the Slovenian Research And Innovation Agency (ARIS).