神经调节器定时调节成年皮质可塑性通过突触符合性痕迹调节
Brendan M Williams1, Michael S Borland2, Tanya T Danaphongse2
1Department of Neuroscience, School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX, United States; Texas Biomedical Device Center, The University of Texas at Dallas, Richardson, TX, United States.
Brain stimulation
|December 19, 2025
概括
皮层可塑性对于学习至关重要,它需要神经调节器释放和神经活动之间的精确时间,类似于突触资格痕迹. 这一发现对于开发有效的增强大脑可塑性的策略至关重要.
科学领域:
- 神经科学是一个神经科学.
- 神经可塑性研究 神经可塑性研究
- 听觉皮层研究 听觉皮层研究
背景情况:
- 学习诱导的皮质重组依赖于神经调节器释放.
- 神经调节器释放以诱导可塑性的确切时间尚不清楚.
- 突触可塑性由符合条件的痕迹控制,需要神经调节器在神经活动发生后几秒钟内到达.
研究的目的:
- 为了调查突触资格痕迹是否调节神经元群体中的可塑性.
- 为了确定迷走神经刺激 (VNS) 诱导的皮质可塑性的时间约束.
主要方法:
- 迷你神经刺激 (VNS) 与声音唤起的听觉皮层活动在不同间隔 (-3s, -1s, 0s, +3s) 配对.
- 在体内电生理学被用来测量20天配对后的音频表示的扩张.
- 通过使用上腺素消耗来证实神经调节剂的作用.
主要成果:
- 与音频开始同时或1秒前的VNS显著扩大了音频频率的听觉皮层表现.
- 在发声前3秒或发声后3秒的VNS没有引起显著的变化.
- 耗尽北上腺素消除了VNS-tone配对诱导的可塑性,证实了神经调节器的参与.
结论:
- 皮层可塑性受到类似于突触可选性痕迹的时间约束.
- 与神经活动相对的神经调节器释放的时间对于诱导皮质可塑性至关重要.
- 这些发现对旨在增强大脑可塑性的时间干预有影响.
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