Behavioral and structural adaptations to stress.

Behavioral and structural adaptations to stress.
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DOI:
10.1016/j.yfrne.2018.02.002
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发表时间:
2018-04
影响因子:
7.4
通讯作者:
Schoenfeld TJ
Schoenfeld TJ
中科院分区:
医学1区
文献类型:
--
作者:
Cameron HA;Schoenfeld TJ

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不可预测的厌恶经历或压力源会导致抑郁和焦虑相关行为的变化以及海马结构的变化,包括成人神经发生、颗粒细胞和锥体细胞树突形态和体积的减少。在这里,我们回顾这些行为和结构变化之间的关系,并讨论这些变化在很大程度上可能是适应性的可能性。具体来说,我们建议齿状回中的新神经元增强对环境变化的行为适应性,根据以前的压力经验在新情况下偏向行为。相反,慢性应激后海马体的萎缩样变化和成人神经发生的减少可能有助于限制慢性应激期间的应激反应并稳定行为。
Unpredictable aversive experiences, or stressors, lead to changes in depression- and anxiety-related behavior and to changes in hippocampal structure including decreases in adult neurogenesis, granule cell and pyramidal cell dendritic morphology, and volume. Here we review the relationship between these behavioral and structural changes and discuss the possibility that these changes may be largely adaptive. Specifically, we suggest that new neurons in the dentate gyrus enhance behavioral adaptability to changes in the environment, biasing behavior in novel situations based on previous experience with stress. Conversely, atrophy-like changes in the hippocampus and decreased adult neurogenesis following chronic stress may serve to limit stress responses and stabilize behavior during chronic stress.
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