Simultaneous recording of neuronal and vascular activity in the rodent brain using fiber-photometry.

Coupling of hemodynamic responses to neuronal activity is the foundation of several functional neuroimaging techniques. Here, we provide three fiber-photometry approaches to simultaneously measure neuronal and vascular signals in the rodent brain using a spectrometer-based system. Two out of these three approaches allow the removal of hemoglobin (Hb)-absorption artifacts and restore the underlying neuronal activity. This technique is applicable to different fluorescent sensors and provides a more accurate measurement of hemodynamic response function in any location of the rodent brain. For complete details on the use and execution of this protocol, please refer to Zhang et al. (2022).