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在患有冲动控制障碍患者的风险决策过程中,次秒多巴胺信号
bioRxiv : the preprint server for biology
|September 25, 2023
概括
患有冲动控制障碍 (ICD) 的患者表现出更有风险的财务决策和大脑中多巴胺水平更快的变化. 帕金森病患者的这些发现强调了决策过程中快速的多巴胺信号.
科学领域:
- 神经科学是一个神经科学.
- 行为科学 行为科学
- 药理学 药理学是指药理学的学科.
背景情况:
- 帕金森病中的冲动控制障碍 (ICD) 是一种与多巴胺类疗法相关的行为成.
- 以前的研究表明,ICD患者的条纹功能和多巴胺活性发生变化.
- 现有的研究缺乏时间分辨率来检查决策过程中的实时多巴胺信号.
研究的目的:
- 实时调查帕金森病患者的条纹体中二次多巴胺信号的实时,有或没有ICD病史的患者.
- 将多巴胺动态与决策过程相关联,特别是在涉及风险和回报的任务中.
主要方法:
- 使用碳纤维微电极在条形体中高频 (10Hz) 细胞外多巴胺测量.
- 在 (N=3) 和没有 (N=3) ICD病史的患者中,在清醒时进行深度大脑刺激 (DBS) 神经外科手术时进行了记录.
- 参与者参与了一项连续的决策任务,在停止服用多巴胺作用药物时进行真实货币博.
主要成果:
- 患有ICD患者的投资金额显著增加,并且对每项试验的投资水平进行了较小的调整.
- 在ICD患者中,多巴胺水平迅速波动 (分秒),预测决策结果,与对照组的稳定水平不同.
- 在阳性结果之后,ICD患者的多巴胺激增更大;对于负面结果,在对照组中,多巴胺水平下降,但在ICD患者中保持稳定.
结论:
- 帕金森病患者与ICD在决策过程中表现出增加的风险行为和加剧的,快速的多巴胺信号,即使在没有药物的情况下.
- 观察到的多巴胺信号可能反映出固有的倾向或之前ICD的后果.
- 未来关于多巴胺在认知和疾病中的研究应该纳入次秒时间动态.
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