Many methods for investigating brain function have been developed that can provide valuable insights into human behavior. Electroencephalography (EEG) uses electrodes placed on the scalp to measure the electric potential differences (voltages) generated by the brain's synchronous neural activity. This method allows us to access the rapidly changing dynamics of neuronal populations and has made EEG a valuable research tool for understanding brain function. Technical and analytical advances in recent years have allowed the combination of EEG with other methods, such as functional magnetic resonance imaging (fMRI), brain stimulation methods, eye-tracking, and peripheral physiology. Learning how these different methods can complement each other to improve our knowledge of brain function has allowed for significant scientific contributions to various research fields.

Furthermore, considering the technical challenges associated with combining multiple measurement modalities and how these challenges can be overcome is essential to the progression of multimodal brain imaging. This Methods Collection focuses on combining EEG in humans with other measurement and stimulation modalities. The objectives of the collection are to share best practices for combining EEG with different methods, encourage standardization of multimodal imaging methods across research fields, and promote multimodal imaging with EEG.