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Published on: August 14, 2015
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颗粒状后皮质层2/3产生高频振荡,动态与海马体节奏相结合,跨越大脑状态
Kaiser C Arndt1, Earl T Gilbert1, Lianne M F Klaver1
1School of Neuroscience, Virginia Tech, Blacksburg, VA 24060, USA.
Cell reports
|March 10, 2024
概括
颗粒后皮质 (gRSC) 中的高频振荡 (HFOs) 在二/三层中产生,并与海马节律结合. 这表明gRSC HFO在不同大脑状态期间的区域间通信中发挥了作用.
科学领域:
- 神经科学是一个神经科学.
- 系统神经科学 系统神经科学
- 计算神经科学是一种神经科学.
背景情况:
- 颗粒状后皮质 (gRSC) 显示高频振荡 (HFO) 在150Hz左右.
- 众所周知,海马 - 潜路径驱动这些gRSC HFO.
- 在gRSC HFO生成的基础上,确切的细胞突触和层状机制仍然不清楚.
研究的目的:
- 调查gRSC内部HFO的生成情况.
- 为了检查gRSCHFO与海马体节律的合.
- 阐明 gRSC HFO 在区域间沟通中的作用.
主要方法:
- 焦点光遗传学和探头记录被用于表现小鼠的行为.
- 在gRSC的不同层 (L2/3,L5) 中的CaMKII表达细胞被选择性激发.
- 使用独立组件分析来分析神经活动模式.
主要成果:
- 在L2/3或L5诱导的HFO中CaMKII细胞的光遗传激发,但在L2/3.3中主要观察到自发的HFO.
- 最高的HFO功率定位在gRSC的L2/3上.
- gRSC HFOs在休息期间与CA1急波波纹 (SPW-Rs) 以及在特定阶段与乙太振荡 (theta oscillations) 证明了合.
- 当前源密度分析显示,在SPW-R和theta振荡期间,HFO的一致模式.
- 发现CA1层缺陷分子中的高马振荡与gRSC HFO功率共调.
结论:
- 在gRSC的2/3层对于自发HFO生成至关重要.
- 在gRSC HFO中,与海马节律 (SPW-Rs和theta) 呈现出明显的合模式.
- 这些发现表明,gRSC HFOs可能在一个涉及gRSC,海马体和中枢内皮层的多突触循环中促进通信,可能支持不同的大脑和行为状态.
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