在Locus coeruleus中,通过选择性地增强感知灵敏度,上腺素有助于视觉空间注意力
Supriya Ghosh1, John H R Maunsell1
1Department of Neurobiology and Neuroscience Institute, University of Chicago, Chicago, IL 60637, USA.
Neuron
|May 3, 2024
概括
当注意力集中在相关刺激上时,位于神经位 (LC) 中的上腺素 (NE) 神经元可以选择性地增强视觉歧视. 这种细胞水平的注意力控制可以改善感知,而不会改变运动反应.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 感官感知是一种感官感知.
背景情况:
- 选择性注意力通过优先考虑相关刺激而不是无关紧要的刺激来增强感知.
- 神经反应增强是一种与注意力相关的感知改善的拟议机制.
- 控制基于注意力的感知敏感性的特定神经通路尚未完全理解.
研究的目的:
- 为了研究在选择性视觉注意力中,在心脏部位 (LC) 中的北上腺素 (NE) 神经元的作用.
- 确定LC-NE神经元活动是否因果关系地影响知觉灵敏度.
- 阐明了注意力调节视觉歧视背后的细胞机制.
主要方法:
- 在视觉区分任务中记录非人类灵长类动物中LC-NE神经元的活动.
- 与行为表现和刺激相关性相关的神经元发射模式.
- 使用光遗传学选择性激活LC-NE神经元并评估对视觉检测和运动控制的影响.
主要成果:
- LC-NE神经元在对侧视野中选择性地表现出刺激引起的尖刺激.
- 这种升与增强的行为敏感性相关,并且在错误试验中没有出现.
- 对LC-NE神经元的光遗传激活改善了对侧刺激的检测,而不改变运动标准.
结论:
- 在视觉注意力的空间选择性控制中,LC-NE神经元活动起着因果作用.
- 在选择性注意力中NE的功能是在颗粒,细胞层面上运作,与其分散的调节作用不同.
- 这些发现揭示了大脑如何优先考虑感官信息以增强知觉的关键细胞机制.
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