扁桃形结构
神经科学
心理学
感觉系统
生物神经网络
补品(生理学)
冻结行为
下丘脑
神经网络
恐惧条件反射
生物
作者
Giancarlo Carli,Francesca Farabollini
出处
期刊:Elsevier eBooks
[Elsevier]
日期:2022-01-01
卷期号:: 51-69
被引量:1
标识
DOI:10.1016/bs.pbr.2022.02.003
摘要
Innate fear-related behavioral responses have evolved as strategies for survival. The neural circuits responsible for defensive responses, studied mainly in rodents, have been substantially preserved across evolution. Amygdala collects sensory information (visual, auditory and olfactory) in the cortical division and conveys it to the striatal output division. Distinct amygdala nuclei/subnuclei are activated by different fearful stimuli, such as exposure to a predator or to an aggressive conspecific. The same stimuli segregation is observed in downstream structures, i.e., hypothalamus and PAG. In guinea pigs, the circuits underlying Tonic Immobility (TI) and freezing in response to a natural predator, have been mapped in different subnuclei of the same amygdala area. In the PAG circuits, defensive responses are differentially represented along the dorso-ventral and rostro-caudal axis. The coordination of behavioral, anti-nociceptive and autonomic responses is due to the overlapping of the involved neurons in longitudinal columns.
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