与甲基胺有关的工作记忆困难,其基础是减少前端对面反应
Robert J Roy1,2, Muhammad A Parvaz3,4,5, Ken T Wakabayashi1
1Department of Psychology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
Addiction biology
|October 16, 2024
概括
工作记忆障碍在有问题的甲基胺使用者中很常见. 大脑成像显示,在工作记忆任务期间,前对面和默认模式区域的神经活动发生变化,这与能力降低有关.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 成研究 研究成研究
背景情况:
- 在有问题的甲胺使用 (MA+) 个体中,工作记忆缺陷很普遍,并且会使人衰弱.
- 在MA+个体中,这些工作记忆困难的神经支仍然不太清楚.
- 了解这些神经功能障碍对于开发有效的干预措施和支持恢复至关重要.
研究的目的:
- 调查与有问题的甲基胺使用个人的工作记忆困难相关的神经功能障碍.
- 为了比较MA+个体和对照组 (MA-) 之间在工作记忆任务期间的大脑活动.
- 探索MA+个体的神经活动模式与工作记忆性能之间的关系.
主要方法:
- 横截面功能磁共振成像 (fMRI) 研究.
- 参与者包括有问题的甲基胺使用者 (MA+,n=65) 和对照者 (MA-,n=44).
- 在fMRI期间进行了参数的n-back任务 (0-back to 2-back),并进行了扫描仪外的认知评估.
主要成果:
- 与MA-参与者相比,MA+参与者表现出明显较低的工作记忆能力.
- 在MA+个体中,fMRI揭示了负载诱导的大脑激活模式的改变,特别是在前对对对和默认模式网络中.
- MA+参与者在前面对面的区域显示了减弱的激活增加,并且在增加任务负载的默认模式区域显示了下降.
- 在MA+个体中,从0-back到2-back增加的前侧对象激活与更好的工作记忆能力相关.
结论:
- 问题性甲基胺使用与工作记忆能力的降低和神经功能障碍的明显模式有关.
- 负载诱导的前端对象和默认模式区域的变化代表了MA+个体中工作记忆缺陷的潜在神经相关性.
- 在工作记忆任务期间的前端对象网络活动可能会成为慢性甲基胺使用者之间工作记忆能力的个体差异的神经签名.
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