Simultaneous dendritic voltage and calcium imaging and somatic recording from Purkinje neurons in awake mice.

ABSTRACT: Spatiotemporal maps of dendritic signalling and their relationship with somatic output is fundamental to neuronal information processing, yet remain unexplored in awake animals. Here, we combine simultaneous sub-millisecond voltage and calcium two-photon imaging from distal spiny dendrites, with somatic electrical recording from spontaneously active cerebellar Purkinje neurons (PN) in awake mice. We detect discrete 1-2 ms suprathreshold voltage spikelets in the distal spiny dendrites during dendritic complex spikes. Spikelets and their calcium correlates are highly heterogeneous in number, timing and spatial distribution within and between complex spikes. Back-propagating simple spikes are highly attenuated. Highly variable 5-10 ms voltage hotspots are localized to fine dendritic processes

SUBMITTER: Roome CJ 

PROVIDER: S-EPMC6107665 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature