In Vivo Calcium Imaging of Neuronal Ensembles in the Intact Dorsal Root Ganglia of a Mouse

Source: Shannonhouse, J., et al.In Vivo Calcium Imaging of Neuronal Ensembles in Networks of Primary Sensory Neurons in Intact Dorsal Root Ganglia. J. Vis. Exp. (2023).The video demonstrates an in vivo calcium imaging technique to monitor neuronal activity in the dorsal root ganglia (DRG) of a transgenic mouse. DRG neurons express a calcium indicator that increases fluorescence intensity upon binding to calcium. Mechanical or thermal stimuli applied to a hind paw generate action potentials that propagate to the DRG, inducing calcium influx in the neurons and resulting in increased fluorescence emission.