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相关概念视频

Working Memory01:24

Working Memory

136
Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
136

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在多发性硬化症中,工作记忆事件相关的网络动态被破坏.

Chiara Rossi1,2, Diego Vidaurre3,4, Lars Costers5,6

  • 1AIMS lab, Center for Neurosciences, Vrije Universiteit Brussel, Brussels, Belgium. chiara.rossi@vub.be.

Communications biology
|November 29, 2024
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概括

多发性硬化症 (MS) 的工作记忆障碍与大脑网络活动的改变有关. 这项研究使用先进的成像技术来识别影响MS患者注意力和认知表现的特定网络变化.

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科学领域:

  • 神经科学是一个神经科学.
  • 认知科学 认知科学
  • 医疗成像医学成像

背景情况:

  • 工作记忆 (WM) 损伤是多发性硬化症 (MS) 的常见早期症状,严重影响患者的生活质量.
  • 了解MS中WM缺陷的神经生理基础对于开发有效干预措施至关重要.

研究的目的:

  • 通过功能神经成像来研究复发性复发性MS中工作记忆障碍的神经生理基础.
  • 为了确定在工作记忆任务期间在MS患者中改变的特定功能性大脑网络.

主要方法:

  • 使用了在视觉 - 语言 n-back 任务中获得的磁脑电图 (MEG) 数据.
  • 应用了一种数据驱动的技术,即时间延迟嵌入隐藏的马尔科夫模型 (TDE-HMM),以提取光谱定义的功能网络.
  • 在MS患者和健康对照者 (HC) 之间比较了网络激活模式.

主要成果:

  • 与刺激编码和注意力控制相关的早期theta前额头网络的激活减少在MS患者中被观察到,与HC患者相比.
  • 这种减少的激活与MS患者的任务精度降低和反应时间增加相关.
  • 一个前端对联网络,显示β合并与P300事件相关的潜力相似,在接受二类药物治疗的MS患者中表现出放大激活.

结论:

  • TDE-HMM技术有效地提取与任务相关的功能网络,这些功能网络显示MS的疾病特异性和与治疗相关的变化.
  • 这些发现表明,改变网络动态,特别是与注意力相关的网络,有助于MS的工作记忆缺陷.
  • 已识别的网络变化可以作为评估和监测MS工作记忆障碍的潜在生物标志物.