Journal
CELL REPORTS
Volume 24, Issue 5, Pages 1243-+Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2018.06.119
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Funding
- Agence Nationale de la Recherche [ANR-14-CE13-0016, ANR-15-CE19-0001-01]
- Human Frontiers Science Program [RGP0015/2016]
- Region Ile de France (Projet GeneTherm - C'Nano - DIM Nano-K)
- Fondation Bettencourt Schueller (Prix Coups d'elan pour la recherche francaise)
- Getty Lab
- European Union under Marie Sklodowska-Curie [747598]
- NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [U01NS090501] Funding Source: NIH RePORTER
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In recent decades, optogenetics has been transforming neuroscience research, enabling neuroscientists to drive and read neural circuits. The recent development in illumination approaches combined with two-photon (2P) excitation, either sequential or parallel, has opened the route for brain circuit manipulation with single-cell resolution and millisecond temporal precision. Yet, the high excitation power required for multi-target photostimulation, especially under 2P illumination, raises questions about the induced local heating inside samples. Here, we present and experimentally validate a theoretical model that makes it possible to simulate 3D light propagation and heat diffusion in optically scattering samples at high spatial and temporal resolution under the illumination configurations most commonly used to perform 2P optogenetics: single-and multi-spot holographic illumination and spiral laser scanning. By investigating the effects of photostimulation repetition rate, spot spacing, and illumination dependence of heat diffusion, we found conditions that make it possible to design a multi-target 2P optogenetics experiment with minimal sample heating.
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