早期感官引起的振荡的突触起源在不成熟的丘脑
Maxim Sheroziya1, Roustem Khazipov2
1Laboratory of Neurobiology, Kazan Federal University, Kazan, Russia.
Neuroscience
|September 28, 2023
概括
新生小鼠甲状腺皮层细胞表现出早期的马振荡,这是由于强烈的突触相互作用和弱的内在电流. 这种相互作用在关键的大脑发育时期塑造了感官处理.
科学领域:
- 神经科学是一个神经科学.
- 发育神经科学的发展神经科学.
- 计算神经科学是一种神经科学.
背景情况:
- 产后大脑发育对外部刺激敏感.
- 新生小鼠具有功能性的体感路径和质体,但皮质还不成熟.
- 未成熟的thalamic突触产生大 postsynaptic 潜力,而内在电流是弱的.
研究的目的:
- 在早期的胸膜活动中研究强突触和弱内在电流之间的相互作用.
- 了解这些相互作用对自发和唤起的胸膜振荡的贡献.
- 阐明发育中的甲状腺皮层系统中感觉唤起的马和螺旋突破振荡背后的机制.
主要方法:
- 在小鼠幼 (出生后第6至7天) 中记录了局部野外潜力 (LFP),并细胞和补丁记录.
- 在尿麻醉下,在体感性丘脑中进行的录音.
- 用单个胡须刺激来唤起神经反应.
主要成果:
- 胡须偏向诱导大幅度激发性事件和阻碍性后突触事件在thalamocortical细胞.
- 刺激事件导致尖峰爆发和潜在的脱极化阻断,由近细胞记录证实.
- 抑制性事件阻止了动作潜力的无活化和调制的马频率发射.
结论:
- 强烈的刺激/抑制突触和弱的内在电流之间的相互作用产生感官唤起的马振荡在thalamocortical细胞.
- 感官唤起的刺激事件有助于产生唤起的螺旋突破.
- 这种突触相互作用对于产后发育期间早期的乳头皮网络活动至关重要.
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