The complex spatial and temporal organization of neural activity in the brain is important for information-processing that guides behavior. Hence, revealing the real-time neural dynamics in freely-moving animals is fundamental to elucidating brain function. Miniature fluorescence microscopes have been developed to fulfil this requirement. With the help of GRadient INdex (GRIN) lenses that relay optical images from deep brain regions to the surface, investigators can visualize neural activity during behavioral tasks in freely-moving animals. However, the application of GRIN lenses to deep brain imaging is severely limited by their availability. Here, we describe a protocol for GRIN lens coating that ensures successful long-term intravital imaging with commercially-available GRIN lenses.
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This work was supported by the National Natural Science Foundation of China (31871054 and 31371112) and the Intramural Research Program of the National Institute on Drug Abuse, NIH, USA.
Conflict of interest
The authors declare no competing financial interests or conflicts of interest.
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Yang, Y., Zhang, L., Wang, Z. et al. A Two-Step GRIN Lens Coating for In Vivo Brain Imaging. Neurosci. Bull. 35, 419–424 (2019). https://doi.org/10.1007/s12264-019-00356-x
- Grin lens