Investigation of the Neural Basis of Social Interactions Using Hyperscanning Functional Magnetic Resonance Imaging.

Hyperscanning functional magnetic resonance imaging (fMRI) was developed to gain deeper insight into the neural basis of social cognition. Simultaneous imaging of brain activity in multiple subjects facilitates analysis of the neural basis of real-time interactions and communication. This method reveals the neural basis of social interactions, including inter-individual synchronization as a phenomenon that cannot be reduced to individuals. This modality enables research into the neural mechanisms underlying social interactions that are integral to many aspects of our lives. I will outline the background, current status, and prospects of development of hyperscanning fMRI, which may be an important methodology in the shift from "first-person" neuroscience (which refers to the interaction between individuals and the environment) to "second-person" neuroscience (which refers to the application of neuroscientific methods to investigate inter-individual associations).