预编码压力对物品的神经基质和情感上下文源记忆检索的相反影响
Carlos Ventura-Bort1, Janine Wirkner2, Julia Wendt1
1Department of Biological Psychology and Affective Science, Faculty of Human Sciences, University of Potsdam, Potsdam, Germany.
Neurobiology of stress
|December 5, 2024
概括
急性压力会增强对物品的记忆,但会损害对不愉快的上下文细节的记忆. 这种压力对记忆检索的影响涉及不同的大脑区域活动变化,影响源记忆.
科学领域:
- 神经科学是一个神经科学.
- 心理学 心理学 心理学
- 认知科学 认知科学
背景情况:
- 众所周知,压力激素系统会影响单一事件的记忆,特别是情绪事件.
- 关于压力如何影响记忆对相关的上下文信息的理解较少,称为源记忆.
研究的目的:
- 调查急性压力对情绪背景源记忆背后的神经机制的影响.
- 检查压力如何影响物品记忆和相关上下文细节的记忆.
主要方法:
- 参与者接受了压力或控制操纵.
- 参与者编码了与愉快,中立或不愉快的背景配对的对象.
- 一周后,使用神经成像技术测试了项目和上下文源记忆.
主要成果:
- 剧烈的压力导致在物品检索过程中,前皮质和中部前额叶皮质 (mPFC) 的激活增加.
- 相反,检索不愉快的上下文信息显示,在压力较大的参与者中,角环 (AG) 和mPFC的激活减少.
- 在AG和mPFC中对物体/不愉快的背景配对进行视觉皮层表示的压力减少记忆恢复.
结论:
- 预编码压力诱导在对项目与上下文信息的记忆检索期间对神经活动产生差异性影响.
- 压力增强了单个项目的记忆相关区域的活动,但减少了背景不愉快的细节.
- 这些发现提供了关于压力对记忆力的解离性影响的见解,对与压力相关的疾病有潜在的临床影响.
相关概念视频
Psychological Responses to Stress
43
Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
43
Role of Amygdala in Memory
160
The amygdala is a small, almond-shaped structure responsible for processing and storing memories, particularly those linked to emotions like fear and stress. It plays an essential role in the brain's response to emotionally significant events and often enhances memory formation by triggering stress hormone release. The amygdala is vital for encoding and retrieving memories associated with fear or stress, a process that is adaptive by helping organisms avoid dangerous situations.
One of the...
One of the...
160
Lazarus's Cognitive Appraisal Theory
160
Cognitive psychologist Richard Lazarus proposed the cognitive-mediational theory of emotions, which emphasizes how individuals' assessments of stressors significantly affect their experience of stress. According to Lazarus, the stress response is determined by a two-step appraisal process: primary appraisal and secondary appraisal. These cognitive appraisals help individuals evaluate the potential impact of a stressor and determine the adequacy of their coping resources.
Primary Appraisal:...
Primary Appraisal:...
160


