冷颤(英语:Shivering)是恒温动物因早期失温症、感到寒冷的原因而做出的身体反应。[1]当核心体温下降时,身体就会开始打冷颤以维持身体机能的稳态。人在发烧时,因身体感到寒冷,有时也会打冷颤——发烧期间,下丘脑会将体温调定点的温度升高,致使身体开始发热的同时,在体温未升到体温调定点前患者依然会感到冷。

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