在Pavlovian调节期间,通过多巴胺调节气味引起的杏仁体潜能
J Amiel Rosenkranz1, Anthony A Grace
1Department of Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA. rosenk@bns.pitt.edu
Nature
|May 17, 2002
概括
帕夫洛夫条件化增强了杏仁体侧核 (LAT) 中的神经元反应. 多巴胺对于这种情感记忆形成至关重要,它影响神经元刺激性和突触可塑性.
科学领域:
- 神经科学是一个神经科学.
- 行为科学 行为科学
- 神经生物学 神经生物学 神经生物学
背景情况:
- 帕夫洛夫的条件化包括将一个中性刺激与一个相关的刺激关联起来,从而导致学习到的反应.
- 杏仁体的侧核 (LAT) 在条件化过程中对情感记忆形成至关重要.
- 在LAT中神经元活动随着条件的增加而增加,并由多巴胺调节.
研究的目的:
- 为了研究在帕夫洛夫条件下LAT中神经元刺激性和突触驱动力的变化.
- 阐明多巴胺在这些神经生理变化中的作用.
主要方法:
- 在Pavlovian条件化过程中,在老鼠的LAT神经元上进行了体内细胞内记录.
- 鼠被暴露在配对或不配对的气味和足部冲击刺激中.
- 用多巴胺抗剂利 (haloperidol) 来评估多巴胺的作用.
主要成果:
- 配对的气味-脚-冲击条件增强了LAT神经元中的突触后潜力 (PSP) 反应和神经元刺激性.
- 一种非配对的气味导致PSP反应的减少,表明习惯.
- 皮醇阻断了PSP增强和增加了兴奋能力,但没有逆转已建立的条件.
结论:
- 条件化和习惯化对LAT神经元活动产生相反的影响.
- 多巴胺在中介神经生理变化中起着至关重要的作用,与LAT中的情感记忆形成有关.
- 这些发现支持多巴胺在情感记忆过程中的既定作用.
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