中间隔膜GABAergic神经元的光遗传沉默扰乱了中部内腔皮层中网格细胞的空间和时间编码
Jennifer C Robinson1, Johnson Ying2, Michael E Hasselmo1
1Center for Systems Neuroscience, Department of Psychological and Brain Sciences, Boston University, Boston, MA, USA.
Cell reports
|August 20, 2024
概括
抑制中间隔膜GABA活性神经元会破坏网状细胞的空间模式和相位前行,这对于导航至关重要. 恢复以较长的间隔发生,揭示了这些神经元对空间编码的重要性.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 计算神经科学是一种神经科学.
背景情况:
- 海马和中枢内腔皮层 (MEC) 创建了一个用于空间导航的认知地图.
- MEC电网细胞表现出六边形的发射模式,这对于这张地图来说至关重要.
- 中间隔膜 (MS) 的GABA活性神经元对于体-海马体网络中的甲基振荡至关重要,但它们在网状细胞功能中的作用尚不清楚.
研究的目的:
- 研究MS-GABAergic神经元在网格细胞空间周期性和时间编码中的作用.
- 为了确定抑制MS-GABAergic神经元如何影响电网细胞发射模式.
主要方法:
- 在动物中,光遗传抑制MS-GABAergic神经元.
- 在抑制和变化的刺激间隔期间分析网格细胞空间周期性和相位前行.
主要成果:
- 对MS-GABAergic神经元的光遗传抑制破坏了网格细胞的空间周期性.
- 在抑制和短暂的刺激间间隔期间观察到干扰.
- 较长的刺激间隔允许恢复电网细胞空间发射,并且相位前行也受到损害.
结论:
- MS-GABAergic神经元对于保持MEC网格细胞的空间周期性至关重要.
- 这些神经元在网格细胞的时间编码中发挥关键作用,包括相位前行.
- 这些发现强调了MS-GABAergic信号传输对于通过内海马回路进行准确的空间导航的重要性.
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