A freezing-like posture to pictures of mutilation
A freezing-like posture to pictures of mutilation
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DOI：
10.1111/j.1469-8986.2005.00287.x
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发表时间：
2005-05-01
期刊：
影响因子：
3.7
通讯作者：
Vargas, CD
中科院分区：
文献类型：
--
作者：
Azevedo, TM;Volchan, E;Vargas, CD
研究人员记录了年轻男性在观看充满情感的图片时的姿势摇摆和心率。假设它们会表现出类似人类的“冻结”行为（即，不动和心率减速），相对于他们对愉快/唤起（运动动作）或中性（物体）图片的反应，当面对持续的不愉快（残缺）图片时。志愿者在观看图片期间站在稳定平台上。在令人不快的图片中，身体摇摆明显减少，沿着增加的平均功率频率（肌肉僵硬指数）。在不愉快的图片中，心率也显示出预期的更大减速。这种模式类似于许多物种在面对威胁性刺激时看到的“冻结”和“恐惧心动过缓”，由促进防御性生存的神经回路介导。
Postural sway and heart rate were recorded in young men viewing emotionally engaging pictures. It was hypothesized that they would show a human analog of "freezing" behavior (i.e., immobility and heart rate deceleration) when confronted with a sustained block of unpleasant (mutilation) images, relative to their response to pleasant/arousing (sport action) or neutral (objects) pictures. Volunteers stood on a stabilometric platform during picture viewing. Significantly reduced body sway was recorded during the unpleasant pictures, along with increased mean power frequency (indexing muscle stiffness). Heart rate during unpleasant pictures also showed the expected greater deceleration. This pattern resembles the "freezing" and "fear bradycardia" seen in many species when confronted with threatening stimuli, mediated by neural circuits that promote defensive survival.