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激发-抑制平衡的转变是时间歧视的感知学习的基础
Rannie Xu1, Edward G Walsh2, Takeo Watanabe1
1Department of Cognitive, Linguistic & Psychological Sciences, United States.
Neuropsychologia
|February 5, 2024
概括
时间感知学习 (TPL) 涉及大脑中的神经可塑性变化. 这项研究表明,听觉间隔的TPL主要影响下皮质 (IPC),这表明它影响下皮质.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 神经成像是一种神经成像.
背景情况:
- 时间感知学习 (TPL) 证明了大脑的可塑性,但神经代谢变化不太清楚.
- 传统的fMRI限制了对TPL神经基础的理解.
- 视觉皮层中的可塑性是视觉感知学习的基础,促使人们对听觉TPL进行调查.
研究的目的:
- 调查听觉间隔的TPL是否涉及听觉通路的可塑性.
- 为了确定这些变化是否发生在低级 (初级听力皮层,A1) 或高级 (下皮层,IPC) 的大脑区域.
- 阐明TPL变化的机制和位置.
主要方法:
- 使用质子磁共振光谱学 (MRS) 与心理物理测量相结合.
- 测量了激发与抑制 (E/I) 比率作为学习指数.
- 接受培训的参与者进行了5天的听觉双色差异化任务.
主要成果:
- 在训练的第一天,在正确的IPC中观察到与任务相关的功能E/I比率的显著增加.
- 左边的A1显示出相反的神经化学活动模式,尽管在统计学上并不显著.
- 在表现平稳后,没有检测到功能性E / I的进一步变化.
结论:
- 时间歧视的改善得到了IPC神经塑性变化的支持.
- IPC和A1的协同功能可能参与时间间隔的获取.
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