BOLD functional magnetic resonance imaging (fMRI) provides crucial information about the large-scale organisation and function of the healthy and diseased brain. Despite its widespread use, identifying the neuronal-basis for specific functional imaging-based signatures, identified in human disorders and animal models, remains a mostly unmet challenge. Presently, we combine chemogenetic neuromodulation with whole-brain resting-state mouse fMRI and tissue clearing, to reveal both the functional contribution and spatial localization of a targeted neuronal population on resting-state functional connectivity. This approach enables researchers to examine the functional role played by selected neuronal populations on distributed neuronal networks.
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