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相关概念视频

Electroconvulsive Therapy01:30

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Electroconvulsive therapy (ECT), or shock therapy, remains a critical biomedical intervention for severe, treatment-resistant depression. While its origins can be traced back to Hippocrates' observations that malaria-induced convulsions alleviated mental illness, modern ECT has evolved significantly from its earlier, more primitive applications. First introduced in 1938 by Ugo Cerletti and his colleagues, ECT involves inducing controlled seizures using electrical currents. In its early...
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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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相关实验视频

Updated: May 15, 2025

Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins
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在严重抑郁症中,在电治疗后,海马体的微观结构变化.

A Le Berre1,2, D Attali3,4, I Uszynski5

  • 1Université Paris Cité, Institute of Psychiatry and Neuroscience of Paris (IPNP), INSERM U1266, Ima-Brain team, 75014, Paris, France. alice.le_berre@ghu-paris.fr.

Molecular psychiatry
|April 8, 2025
PubMed
概括

电疗法 (ECT) 增加海马体积,表明神经可塑性. 先进的MRI技术,如神经元导向分散和密度成像 (NODDI),在ECT治疗后揭示了大脑结构的变化.

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Last Updated: May 15, 2025

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科学领域:

  • 神经成像是一种神经成像.
  • 神经可塑性 神经可塑性
  • 精神病学是一个精神病学.

背景情况:

  • 电疗法 (ECT) 是严重抑郁症的有效治疗方法.
  • 已知ECT可诱导海马体体积增加,这表明神经可塑性.
  • 需要使用非侵入性体内 ECT 诱导的神经可塑性标志物.

研究的目的:

  • 通过神经元导向分散和密度成像 (NODDI) 在ECT后体内研究海马神经可塑性.
  • 为了将神经成像发现与对ECT的临床反应相关联.

主要方法:

  • 在43名接受ECT的抑郁患者和24名对照患者的长度MRI研究中.
  • 在基线,中期治疗和治疗后获得的多扩散MRI和3DT1加权成像.
  • 使用扩散张力成像 (DTI),Q球建模和NODDI进行分析,以评估微结构性质 (例如NDI,ODI,FA,MD).
  • 使用FreeSurfer进行的海马和子场体积测量.

主要成果:

  • 电电图诱导显著的双边海马体积增加.
  • 与对照组相比,患者表现出不同的扩散特征 (更高的FA,更低的GFA/ODI).
  • 在ECT后,观察到GFA,FA,AD,MD和Fiso的减少,以及ODI和NDI的增加.
  • NDI和Fiso的变化局部存在于牙状.
  • 在治疗中期,ECT反应者表现出较大的右海马体积增加.

结论:

  • ECT诱导的海马体积增加与NODDI可以检测到的显著的微观结构变化有关.
  • 这些发现提供了与ECT相关的海马神经可塑性的体内证据,特别是在牙状圈内.
  • NODDI参数为ECT治疗反应和神经可塑性提供了潜在的生物标志物.