皮质中味觉刺激的感觉和味觉编码涉及动态和不对称的皮质-杏仁体相互作用
Abuzar Mahmood1,2, Jessica R Steindler3, Donald B Katz1,2
1Department of Psychology, Volen Center for Complex Systems, Brandeis University, Waltham, MA Lewis Katz School of Medicine.
Journal of neurophysiology
|January 24, 2026
概括
参与味觉处理的大脑区域,即味觉皮质 (GC) 和底侧杏仁体 (BLA),都在相互进行"对话". 这种动态的相互作用影响味觉和决策,每个区域轮流领导神经通信.
科学领域:
- 神经科学是一个神经科学.
- 感官处理 感官处理
- 决策 - 决策 - 决策 - 决策
背景情况:
- 味觉皮层 (GC) 和底侧杏仁体 (BLA) 中的味觉反应呈现出一个连贯的,连续的模式.
- BLA和GC之间的相互连接与味道处理有关,但这种相互作用的性质 (例如,相互对话与单向驱动) 和其功能相关性仍然不清楚.
研究的目的:
- 调查BLA和GC味觉反应之间观察到的连贯性是否反映了相互的神经对话.
- 为了确定这种BLA-GC"对话"是否与GC内的味道处理动态有关.
- 探索BLA和GC之间的神经相互作用如何影响单个神经元的反应和味道编码.
主要方法:
- 在醒着的老鼠中同时记录GC和BLA的味觉反应.
- 网络和单个神经元分析,以评估区域间的影响和连接.
- 基于其与BLA推断的连接性来对GC神经元进行分类,以检查响应特性.
主要成果:
- 在μ频带中观察到BLA和GC之间的不对称,相互影响,反映了味道处理动态.
- 在300-1000msec之间,BLA影响了GC (当BLA编码口感时),随后,GC影响了BLA (当GC反应变得与口感相关时).
- 受BLA影响的GC神经元表现出更强烈的味道特异性和可口性相关反应,在双向BLA-GC影响的神经元中发现的最强大的味道编码.
结论:
- 这些发现支持BLA和GC之间的互惠"轮流"通信模型,作为一个统一的结构运作.
- 这种杏仁核-皮质循环在味道处理和决策中起着至关重要的作用.
- 在这个电路中的神经相互作用显著塑造了单个神经元的反应和味道编码.
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