经过负面强化后的持续威胁回避与高度状态焦虑不相关
Elizabeth A Crummy1, Brittany L Chamberlain1, J P Gamboa2
1Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania 15219.
概括
研究人员开发了一种小鼠模型,用于积极避免学习,以研究强迫症 (OCD). 这个模型有助于研究避开行为和焦虑在强迫症发展中的作用,识别潜在的涉及的大脑区域.
科学领域:
- 神经科学是一个神经科学.
- 行为科学 行为科学
- 精神病学是一个精神病学.
背景情况:
- 强迫症 (OCD) 涉及强迫症和强迫症,通常与管理焦虑的回避行为有关.
- 避免在强迫症发展中的确切作用及其与焦虑状态的相互作用仍然不清楚.
研究的目的:
- 开发和验证一个工具性的负增强范式,用于研究小鼠的积极回避.
- 探索消极强化史,焦虑行为和避免学习的神经相关物之间的关系.
主要方法:
- 设计了一个仪器负增强任务,在这个任务中,小鼠学会了按杆以避免脚震.
- 评估了行为获取,不确定性下的稳定性和响应模式.
- 直接早期基因c-Fos表达的探索性分析确定了活跃的大脑区域.
主要成果:
- 鼠标表现出高收购率 (75%) 和稳定的积极回避学习,即使有任务修改.
- 避免反应持续并随着强化而增加,独立于焦虑测试.
- c-Fos的表达与皮质和杏仁核电路相关,涉及到积极的回避和防御行为.
结论:
- 开发的小鼠模型有效地捕捉了与强迫症相关的积极回避学习.
- 在标准测试中,负增强史与焦虑行为没有直接相关.
- 皮质前皮层和杏仁体区域是训练有素的负面强化和积极避免的关键神经基质.
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