PT - JOURNAL ARTICLE AU - McRaven, Christopher AU - Tanese, Dimitrii AU - Zhang, Lixia AU - Yang, Chao-Tsung AU - Ahrens, Misha B. AU - Emiliani, Valentina AU - Koyama, Minoru TI - High-throughput cellular-resolution synaptic connectivity mapping <em>in vivo</em> with concurrent two-photon optogenetics and volumetric Ca<sup>2+</sup> imaging AID - 10.1101/2020.02.21.959650 DP - 2020 Jan 01 TA - bioRxiv PG - 2020.02.21.959650 4099 - http://biorxiv.org/content/early/2020/02/25/2020.02.21.959650.short 4100 - http://biorxiv.org/content/early/2020/02/25/2020.02.21.959650.full AB - The ability to measure synaptic connectivity and properties is essential for understanding neuronal circuits. However, existing methods that allow such measurements at cellular resolution are laborious and technically demanding. Here, we describe a system that allows such measurements in a high-throughput way by combining two-photon optogenetics and volumetric Ca2+ imaging with whole-cell recording. We reveal a circuit motif for generating fast undulatory locomotion in zebrafish.