School of Applied and Engineering Physics, Cornell University, Ithaca, New York, USA.
Nancy E. and Peter C. Meining School of Biomedical Engineering, Cornell University, Ithaca, New York, USA.
Nat Methods. 2017 Apr;14(4):388-390. doi: 10.1038/nmeth.4183. Epub 2017 Feb 20.
High-resolution optical imaging is critical to understanding brain function. We demonstrate that three-photon microscopy at 1,300-nm excitation enables functional imaging of GCaMP6s-labeled neurons beyond the depth limit of two-photon microscopy. We record spontaneous activity from up to 150 neurons in the hippocampal stratum pyramidale at ∼1-mm depth within an intact mouse brain. Our method creates opportunities for noninvasive recording of neuronal activity with high spatial and temporal resolution deep within scattering brain tissues.
高分辨率光学成像是理解大脑功能的关键。我们证明,在 1300nm 激发下的三光子显微镜能够实现超过双光子显微镜深度极限的 GCaMP6s 标记神经元的功能成像。我们在完整小鼠大脑内约 1mm 深的海马锥体层中记录了多达 150 个神经元的自发活动。我们的方法为在散射脑组织深处进行具有高时空分辨率的神经元活动的非侵入性记录创造了机会。