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Neural activity does not always lie in a low-dimensional subspace. The authors extend this classic view to show that task-relevant information is distributed across multiple covariability classes and propose a new method, sliceTCA, to disentangle them.
A real-time analysis system was developed for an up to 500-megabyte-per-second image stream. This system can extract activities from up to 100,000 neurons in larval zebrafish brains and enables closed-loop perturbations of brain-wide neural dynamics at cellular resolution.
Rabies-virus-based tracing is a widely used technique for mapping neural circuitry, but its cytotoxicity has limited its applications. Here Jin et al. present a second-generation system with minimal toxicity, using double-deletion-mutant rabies viruses.