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bioRxiv · 10.1101/2022.08.05.503006

flexLiTE: flexible micro-LED integrated optoelectrodesfor minimally-invasive chronic deep-brain study

Ko, E.·Yoon, E.·Voroslakos, M.·Buzsaki, G.
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Abstract

Understanding complex neuronal circuitry and its functions of a living organism requires a specialized tool which is capable of recording a large ensemble of neuronal signals at single cell resolution and modulating neuronal activities selectively in the target region of brains with high spatiotemporal resolution, while sustaining long-term chronic operation without significant tissue degeneration or device shifts. We hereby present an ultra-flexible, minimally-invasive, Michigan-type neural probe for chronic opto-electrophysiology studies: flexLiTE (flexible micro-LED integrated optoelectrodes). flexLiTE incorporates monolithically integrated, soma-sized inorganic micro-LEDs (12 individually operated) and 32 recording electrodes. Both stimulation and recording modalities were achieved by stacking two modules on a flexible substrate: one with micro-LEDs for neuromodulation and the other with recording sites, resulting in a 115 m-wide,12 m-thick, 10 mm-long optoelectrode. From prototype devices, we demonstrated the reliable operation of flexLiTEs for recording and modulation of hippocampal neurons in a freely moving mice for over [~]8 month.

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Ko, E., Yoon, E., Voroslakos, M., Buzsaki, G.. 2022-08-06. flexLiTE: flexible micro-LED integrated optoelectrodesfor minimally-invasive chronic deep-brain study. https://doi.org/10.1101/2022.08.05.503006

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