神经转换从视网形坐标到以背景为中心的坐标在前
Motoaki Uchimura1, Hironori Kumano1,2, Shigeru Kitazawa3,4,5
1Dynamic Brain Network Laboratory, Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka 565-0871, Japan.
概括
神经表示从自我中心的坐标转变为非自我中心的坐标. 神经元动态更新视觉信息,整合背景背景,使空间意识稳定.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 视觉感知 视觉感知 视觉感知
背景情况:
- 视觉信息处理始于视网膜坐标,并进展到状和非自我中心的框架.
- 非自我中心坐标转换背后的神经机制在很大程度上是未知的.
- 在非自我中心的空间表现中,precuneus被隐含在内.
研究的目的:
- 为了研究自动自我中心到非自我中心的坐标转换在子 precuneus.
- 为了确定背景定受体场的神经相关性.
- 阐明空间信息处理的时间动态.
主要方法:
- 功能成像用于识别关键的大脑区域.
- 来自巨 precuneus 中神经元的电生理记录.
- 对神经元受体场 (RF) 和它们对刺激,视网膜或背景的定进行分析.
- 对有或没有背景的刺激的神经反应的时间分析.
主要成果:
- 6.2%的前神经元表现出背景定射频,而16%的神经元有视网膜类射频.
- 以背景为中心的神经元显示出从视网膜 (∼90 ms) 到背景坐标 (∼150 ms) 的时间转移.
- 刺激信息主导了早期的视觉处理,而背景信息在以后变得突出,这表明了时间分割复杂化.
结论:
- 前皮在将自我中心的视觉信息转化为非自我中心的表现中发挥着关键作用.
- 前皮质中的神经元群体动态地更新空间信息,随着时间的推移整合背景背景.
- 这种时间整合机制支持对象相对于周围环境的稳定表示.
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