Zebrafish are an important vertebrate model used to view the mechanisms underlying seizure disorders. Due to their relatively small size and transparency, larval zebrafish are an excellent model through which to view the occurence of seizure-like neural activity in vivo using light sheet fluorescence microscopy (LSFM). Although LSFM possesses good optical sectioning capability and high speed, the resolution and contrast degrade as the imaging plane is moved deeper into the sample due to refractive index variations. We have developed a system that combines a structured illumination light sheet microscope with adaptive optics in the emission path to correct optical aberrations and increase the resolution when imaging deep into the sample. We show that our system can record neural activity fast enough to capture seizure events, and is able to correct optical aberrations throughout the sample.
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