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动物发生防御警觉反应时,心血管活动有一系列特征性变化。与此有关的中枢结构有下丘脑穹窿周围区,中脑中央灰质及延髓腹侧的巨细胞旁外侧核等。中枢内还有与防御反应相拮抗的交感抑制系统。这两系统的动态平衡,对维持交感紧张性与血压水平有重要作用。过强而持久的防御反应可能是引起某些类型高血压、心律失常等心血管疾病的一个原因。
There is a series of characteristic changes in cardiovascular activity when an animal responds to a defensive alert. Related to the central structure of the area around the hypothalamus vault, central gray matter in the medulla oblongata and medulla oblongata outside the lateral nucleus and so on. Sympathetic inhibition system antagonistic defense reaction. The dynamic balance of these two systems plays an important role in maintaining sympathetic tone and blood pressure levels. A strong and long-lasting defensive response may be a cause of some types of cardiovascular disease such as hypertension and arrhythmia.