中的高速全脑成像
High-speed whole-brain imaging in .
作者信息
Gauthey Wayan, Lin Albert, Ahmed Osama M, Leifer Andrew M, Murthy Mala, Thiberge Stephan Y
机构信息
Princeton Neuroscience Institute, Princeton University, Princeton, NJ, USA 08540.
Center for the Physics of Biological Function, Princeton University, Princeton, NJ, USA.
出版信息
bioRxiv. 2025 Jun 19:2025.06.18.660371. doi: 10.1101/2025.06.18.660371.
Recent advances in brain-wide recordings of small animals such as worms, fish, and flies have revealed complex activity involving large populations of neurons. In the brain, with about 140,000 neurons, brain-wide recordings have been critical to uncovering widespread sensory and motor activity. However, current limitations in volumetric imaging rates hinder the accurate capture of fast neural dynamics. To improve the speed of volumetric imaging in , we leverage the recently introduced light beads microscopy (LBM) method. We built a microscope and a LBM module tailored to fly brain experiments and used it to record brain-wide calcium signals in adult behaving flies at 28 volumes per second and at 60 volumes per second when selecting the central brain alone. We uncover fast-timescale auditory responses that are missed with standard volumetric imaging. We also demonstrate how temporal super-resolution can be combined with LBM data to uncover responses to single courtship song pulses. This establishes LBM as a viable tool for capturing whole-brain activity at high spatial and temporal resolution in the fly.
近期在对蠕虫、鱼类和苍蝇等小动物进行全脑记录方面取得的进展,揭示了涉及大量神经元的复杂活动。在拥有约140,000个神经元的大脑中,全脑记录对于揭示广泛的感觉和运动活动至关重要。然而,当前体积成像速率的限制阻碍了对快速神经动力学的准确捕捉。为了提高体积成像的速度,我们利用了最近引入的光珠显微镜(LBM)方法。我们构建了一台专门针对果蝇大脑实验的显微镜和一个LBM模块,并使用它在成年行为果蝇中记录全脑钙信号,当仅选择中枢脑时,记录速度为每秒28帧和每秒60帧。我们发现了标准体积成像遗漏的快速时间尺度听觉反应。我们还展示了如何将时间超分辨率与LBM数据相结合,以揭示对单个求偶歌声脉冲的反应。这确立了LBM作为一种在果蝇中以高空间和时间分辨率捕捉全脑活动的可行工具。