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Technologies for imaging neural activity in large volumes
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Journal Article
Technologies for imaging neural activity in large volumes
2016
Overview
Ji
et al
. review emerging microscopy technologies that enable large-volume imaging of neural circuits. Focusing on two-photon fluorescence microscopy, they explored critical factors that limit imaging speed and restrict image volume, and also discuss three-dimensional imaging methods and their applications in rapid volume imaging of neural activity.
Neural circuitry has evolved to form distributed networks that act dynamically across large volumes. Conventional microscopy collects data from individual planes and cannot sample circuitry across large volumes at the temporal resolution relevant to neural circuit function and behaviors. Here we review emerging technologies for rapid volume imaging of neural circuitry. We focus on two critical challenges: the inertia of optical systems, which limits image speed, and aberrations, which restrict the image volume. Optical sampling time must be long enough to ensure high-fidelity measurements, but optimized sampling strategies and point-spread function engineering can facilitate rapid volume imaging of neural activity within this constraint. We also discuss new computational strategies for processing and analyzing volume imaging data of increasing size and complexity. Together, optical and computational advances are providing a broader view of neural circuit dynamics and helping elucidate how brain regions work in concert to support behavior.
Publisher
Nature Publishing Group US,Nature Publishing Group
