大脑重组:中风后奖励网络中的功能连接发生变化
Yésica E Martínez1, Mario Widmer2, Josua Zimmermann3
1Department of Neuropsychology, University of Zurich, Zurich Switzerland; Cereneo Center for Neurology and Rehabilitation, Vitznau, Switzerland; Lake Lucerne Institute, Vitznau, Switzerland.
NeuroImage. Clinical
|November 25, 2025
概括
在运动学习过程中,中风会改变大脑的奖励网络连接. 这些变化,包括连接的增加和减少,可能会影响恢复,并建议准奖励途径可以帮助康复.
科学领域:
- 神经科学是一个神经科学.
- 神经康复疗法 神经康复疗法
- 功能神经成像 功能神经成像
背景情况:
- 动机对于中风后的恢复至关重要,通常与奖励通路激活有关.
- 脑卒中可能会扰乱条纹激活和奖励网络连接,可能会阻碍运动学习和康复.
- 在中风后,这些奖励处理变化的潜在机制仍然不清楚.
研究的目的:
- 为了研究中风如何影响运动学习期间大脑的奖励网络中的功能连接.
- 检查中风,奖励处理和运动任务表现之间的关系.
主要方法:
- 使用功能磁共振成像 (fMRI) 研究亚急性中风患者 (n=28) 和健康对照 (n=18).
- 采用了通用心理生理相互作用 (gPPI) 模型来分析奖励网络功能连接在手腕运动学习任务期间与货币奖励.
- 在中风患者和对照人群之间比较功能连接模式.
主要成果:
- 与对照人群相比,中风患者在奖励网络功能连接方面表现出显著的变化.
- 观察到腹膜区域,黑色物质,条纹体,前中心环,和轨道前皮层之间的连接性增加.
- 发现腹部体区域和体核之间的连接性下降,尽管两组之间的运动性能和奖励接收相似.
结论:
- 脑中风诱导奖励网络的实质性重组,其特点是连接的增加 (超连接) 和减少 (低连接).
- 超连接性可能代表补偿机制,而低连接性可能会损害奖励处理和学习.
- 研究结果表明,针对奖励途径的干预措施,如反或大脑刺激,可以增强中风后的运动恢复.
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