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Fast optical signal measured by FD-NIRS with (A) phase from the visual cortex of human subjects at the cortical location of predicted response and at a control location (EROS: event-related optical signal), and (B) DC Intensity from the prefrontal cortex (top) in comparison with the event-related potential (ERP) response. (A) Reprinted with permission from Gratton and Fabiani (2003)© Wiley; (B) Reprinted with permission from Proulx et al. (2018b)© Elsevier.
