焦虑可以缓和睡眠对选择性遗忘的影响
Risto Halonen1, Tommi Makkonen2, Liisa Kuula3
1SleepWell Research Program, Faculty of Medicine, P.O. Box 9, FI-00014, University of Helsinki, Finland.
焦虑会阻碍睡眠选择性地忘记不必要的记忆的能力. 低焦虑的个体在睡眠后表现出更好的定向遗忘 (DF),与睡眠相关,与高焦虑组不同.
科学领域:
- 认知神经科学 认知神经科学
- 睡眠研究 睡眠研究
- 焦虑症 焦虑症 焦虑症
背景情况:
- 焦虑与持续的痛苦记忆有关.
- 睡眠在选择性记忆巩固中的作用,特别是在焦虑方面,还未得到充分研究.
- 定向遗忘 (DF) 是在编码过程中故意抑制记忆.
研究的目的:
- 为了研究睡眠驱动的选择性记忆巩固,使用定向遗忘 (DF) 范式.
- 为了检查焦虑水平和睡眠对记忆巩固的相互作用.
- 探索潜在的机制,有助于不需要的记忆在焦虑中的持久性.
主要方法:
- 一个由58名参与者组成的样本被分为低焦虑和高焦虑子组 (GAD-7).
- 参与者用记住 (R) 或忘记 (F) 线索 (item-method DF) 编码了120张面部图像 (中性/恐惧).
- 记忆检索发生在白天小睡后和两天后的立即;DF效应被计算为R-和F-cued项之间的识别差异.
主要成果:
- 总体上观察到显著的DF效应,R-cued图像比F-cued图像更好地被识别.
- 在午睡期间,DF效应的大小显著增加,仅限于低焦虑个体.
- 在低焦虑的人群中,这种与睡眠相关的DF增强与睡眠螺旋密度有关.
结论:
- 与睡眠相关的记忆处理可能会在焦虑症较高的人群中发生变化,从而损害了区分相关信息与无关信息的能力.
- 记忆处理中的这种改变可能会导致焦虑中不必要的记忆的持续存在.
- 了解睡眠和焦虑之间的相互作用为焦虑障碍提供了新的干预策略的潜力.
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