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Imaging the voltage of neurons distributed across entire brains of larval zebrafish

Wang, Z.; Zhang, J.; Symvoulidis, P.; Guo, W.; Zhang, L.; Wilson, M. A.; Boyden, E. S.

2023-12-16 neuroscience
10.1101/2023.12.15.571964 bioRxiv
Show abstract

Neurons interact in networks distributed throughout the brain. Although much effort has focused on whole-brain calcium imaging, recent advances in genetically encoded voltage indicators (GEVIs) raise the possibility of imaging voltage of neurons distributed across brains. To achieve this, a microscope must image at high volumetric rate and signal-to-noise ratio. We present a remote scanning light-sheet microscope capable of imaging GEVI-expressing neurons distributed throughout entire brains of larval zebrafish at a volumetric rate of 200.8 Hz. We measured voltage of [~]1/3 of the neurons of the brain, distributed throughout. We observed that neurons firing at different times during a sequence were located at different brain locations, for sequences elicited by a visual stimulus, which mapped onto locations throughout the optic tectum, as well as during stimulus-independent bursts, which mapped onto locations in the cerebellum and medulla. Whole-brain voltage imaging may open up frontiers in the fundamental operation of neural systems.

Published in Nature Methods (predicted rank #1) · training set

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