Two-photon calcium imaging is widely used to observe neural activity in animal brains. Improvements in two-photon microscopy and calcium indicators in recent years have led to higher sensitivity, faster speed, and larger field-of-view imaging, which have facilitated observation of large-scale neuronal activity in three dimensions on a micrometer to millimeter scale. In this paper, we describe these novel two-photon imaging techniques and their applications to neuroscience.
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K. Kitamura (2024) studied this question.
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