Functional connectomics spanning multiple areas of mouse visual cortex
J. Alexander Bae,
Agnes L Bodor,
Daniel J Bumbarger,
Manuel A. Castro,
Nuno Macarico da Costa,
Paul G. Fahey,
Shanka Subhra Mondal,
R. Clay Reid,
Casey M. Schneider-Mizell,
H. Sebastian Seung,
Fabian H. Sinz,
Cameron L. Smith,
Zheng H. Tan,
Andreas S. Tolias,
Nicholas L. Turner,
Edgar Y. Walker,
Posted 29 Jul 2021
bioRxiv DOI: 10.1101/2021.07.28.454025
Posted 29 Jul 2021
The value of an integrated approach for understanding the neocortex by combining functional characterization of single neuron activity with the underlying circuit architecture has been understood since the dawn of modern neuroscience. However, in practice, anatomical connectivity and physiology have been studied mostly separately. Following in the footsteps of previous studies that have combined physiology and anatomy in the same tissue, here we present a unique functional connectomics dataset that contains calcium imaging of an estimated 75,000 neurons from primary visual cortex (VISp) and three higher visual areas (VISrl, VISal and VISlm), that were recorded while a mouse viewed natural movies and parametric stimuli. The functional data were co-registered with electron microscopy (EM) data of the same volume which were automatically segmented, reconstructing more than 200,000 cells (neuronal and non-neuronal) and 524 million synapses. Subsequent proofreading of some neurons in this volume yielded reconstructions that include complete dendritic trees as well the local and inter-areal axonal projections. The largest proofread excitatory axon reached a length of 19 mm and formed 1,893 synapses, while the largest inhibitory axon formed 10,081 synapses. Here we release this dataset as an open access resource to the scientific community including a set of analysis tools that allows easy data access, both programmatically and through a web user interface.
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