1. All-Optical Volumetric Physiology for Connectomics in Dense Neuronal Structures
- Author
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Kuo-Jen Hsu, Kai-Ping Yang, Shun-Chi Wu, Ann-Shyn Chiang, Chu-Yi Tai, Wei-Kun Chang, Yen-Yin Lin, Shi-Wei Chu, Chiao Huang, and Ching-Chun Hsiao
- Subjects
0301 basic medicine ,Connectomics ,Anterior Visual Pathway ,Computer science ,Physiology ,02 engineering and technology ,Article ,03 medical and health sciences ,All optical ,Techniques in Neuroscience ,medicine ,lcsh:Science ,Multidisciplinary ,021001 nanoscience & nanotechnology ,030104 developmental biology ,medicine.anatomical_structure ,nervous system ,Lens (anatomy) ,Point stimulation ,Connectome ,Biological Sciences Tools ,lcsh:Q ,Spatiotemporal resolution ,0210 nano-technology ,3d coordinates ,Neuroscience ,Biological Sciences Research Methodologies - Abstract
Summary All-optical physiology (AOP) manipulates and reports neuronal activities with light, allowing for interrogation of neuronal functional connections with high spatiotemporal resolution. However, contemporary high-speed AOP platforms are limited to single-depth or discrete multi-plane recordings that are not suitable for studying functional connections among densely packed small neurons, such as neurons in Drosophila brains. Here, we constructed a 3D AOP platform by incorporating single-photon point stimulation and two-photon high-speed volumetric recordings with a tunable acoustic gradient-index (TAG) lens. We demonstrated the platform effectiveness by studying the anterior visual pathway (AVP) of Drosophila. We achieved functional observation of spatiotemporal coding and the strengths of calcium-sensitive connections between anterior optic tubercle (AOTU) sub-compartments and >70 tightly assembled 2-μm bulb (BU) microglomeruli in 3D coordinates with a single trial. Our work aids the establishment of in vivo 3D functional connectomes in neuron-dense brain areas., Graphical Abstract, Highlights • All-optical volumetric physiology = precise stimulation + fast volumetric recording • Precise single-photon point stimulation among genetically defined neurons • 3D two-photon imaging by an acoustic gradient-index lens for dense neural structures • Observation of 3D functional connectivity in Drosophila anterior visual pathway, Neuroscience; Techniques in Neuroscience; Biological Sciences Research Methodologies; Biological Sciences Tools
- Published
- 2019