The Frontiers in Neurophotonics Symposium is a biennial event that brings together neurobiologists and physicists/engineers who share interest in the development of leading-edge photonics-based approaches to understand and manipulate the nervous system, from its individual molecular components to complex networks in the intact brain. In this Community paper, we highlight several topics that have been featured at the symposium that took place in October 2022 in Québec City, Canada.
To study the brain and the related neuronal network activity, many attempts were made to design and develop platforms able to induce and record neuronal signals. However, many brain processes - like memory formation and storage - and diseases - like amnesia or epilepsy - need more basic studies. For these, a bottom-up approach is needed, starting from 2D in-vitro neuronal cultures. In this work, we will present two experimental systems able to optogenetically interact with 2D neuronal networks with patternized light. One system consists in a Digital Light Projector (DLP) integrated in a microscope setup, which can illuminate neurons from the top; the other, is a compact and transportable photonic chip, properly designed to illuminate neurons plated on its surface.
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