Combining transcranial electrical stimulation with electroencephalography: a multimodal approach.

Although numerous studies have been performed using transcranial electrical stimulation (tES), our understanding of tES-induced effects on neural activity remains limited, especially regarding the effects on neural networks. The use of an approach, such as electroencephalography (EEG) in combination with tES, could allow for a more detailed understanding of the neural mechanisms involved in these observed changes. Co-registration of tES and EEG might provide high temporal resolution information regarding tES-induced modifications/modulations to cortical activity that corresponds to different stages of processing. This article aims at presenting new knowledge about this recent and innovative approach that can possibly provide information about the dynamics of human brain functions beyond what is possible by the use of either method alone.