证据表明,在目标追踪期间,半球之间存在活跃的交换.
Matthew B Broschard1, Jefferson E Roy1, Scott L Brincat1
1The Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
概括
大脑通过活跃的"握手"过程协调半球之间的信息传输. 神经活动,特别是α和theta功率,标志着注意力转移为统一的感知.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 灵长类动物研究研究
背景情况:
- 大脑表现出半球之间认知资源的横向化.
- 尽管横向化,但感知仍然是统一的,需要半球间协调.
- 了解大脑半球之间的信息传输机制至关重要.
研究的目的:
- 研究大脑半球之间信息传输的基础的神经机制.
- 在注意力转移期间确定与半球间协调相关的特定大脑活动模式.
主要方法:
- 在非人类灵长类动物的侧面前额皮质中记录了双边神经活动.
- 在隐蔽视觉目标跟踪期间监控神经信号 (β,gamma,alpha,theta功率和spiking活动).
- 当目标在视觉半场之间移动时,分析了大脑活动.
主要成果:
- 贝塔和马功率,以及尖端信息,与视觉目标的感官处理相关.
- 在hemifield穿越之前,阿尔法功率增加了,这表明了预期的注意.
- 经过交叉后的theta功率达到峰值,表明信息传输完成.
- 尖端信息还显示了预期和完成相关的模式.
结论:
- 神经活动,特别是α和theta振荡,支持一个活跃的"握手"机制,用于半球间信息传输.
- 这种神经握手对于信息在视觉领域的无整合至关重要.
- 这些发现提供了关于大脑如何保持统一的感知尽管半球专业化的见解.
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