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对初级视觉皮层进行光遗传学刺激可驱动视觉联合皮层的活动。

Optogenetic stimulation of the primary visual cortex drives activity in the visual association cortex.

作者信息

Ortiz-Rios Michael, Agayby Beshoy, Balezeau Fabien, Haag Marcus, Rima Samy, Cadena-Valencia Jaime, Schmid Michael C

机构信息

Biosciences Institute, Henry Wellcome Building, Medical School, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK.

Functional Imaging Laboratory, Deutsches Primatenzentrum (DPZ), Leibniz-Institut für Primatenforschung, Göttingen, Germany.

出版信息

Curr Res Neurobiol. 2023 Apr 8;4:100087. doi: 10.1016/j.crneur.2023.100087. eCollection 2023.

Abstract

Developing optogenetic methods for research in non-human primates (NHP) is important for translational neuroscience and for delineating brain function with unprecedented specificity. Here we assess, in macaque monkeys, the selectivity by which optogenetic stimulation of the primary visual cortex (V1) drives the local laminar and widespread cortical connectivity related to visual perception. Towards this end, we transfected neurons with light-sensitive channelrhodopsin in dorsal V1. fMRI revealed that optogenetic stimulation of V1 using blue light at 40 Hz increased functional activity in the visual association cortex, including areas V2/V3, V4, motion-sensitive area MT and frontal eye fields, although nonspecific heating and eye movement contributions to this effect could not be ruled out. Neurophysiology and immunohistochemistry analyses confirmed optogenetic modulation of spiking activity and opsin expression with the strongest expression in layer 4-B in V1. Stimulating this pathway during a perceptual decision task effectively elicited a phosphene percept in the receptive field of the stimulated neurons in one monkey. Taken together, our findings demonstrate the great potential of optogenetic methods to drive the large-scale cortical circuits of the primate brain with high functional and spatial specificity.

摘要

开发用于非人灵长类动物(NHP)研究的光遗传学方法对于转化神经科学以及以前所未有的特异性描绘脑功能至关重要。在此,我们在猕猴中评估了对初级视觉皮层(V1)进行光遗传学刺激驱动与视觉感知相关的局部层状和广泛皮层连接的选择性。为此,我们在背侧V1区用光敏通道视紫红质转染神经元。功能磁共振成像显示,使用40赫兹蓝光对V1进行光遗传学刺激可增加视觉联合皮层的功能活动,包括V2/V3区、V4区、运动敏感区MT和额叶眼区,尽管不能排除非特异性加热和眼球运动对此效应的影响。神经生理学和免疫组织化学分析证实了光遗传学对放电活动和视蛋白表达的调节,在V1区的4 - B层表达最强。在一项感知决策任务中刺激该通路有效地在一只猴子受刺激神经元的感受野中引发了光幻视。总之,我们的研究结果证明了光遗传学方法以高功能和空间特异性驱动灵长类大脑大规模皮层回路的巨大潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a89f/10313868/af8416ba644a/ga1.jpg

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