Sigman S E, Prestrude A M
Dev Psychobiol. 1981 Sep;14(5):473-80. doi: 10.1002/dev.420140509.
In present study we attempted to determine whether the characteristic unresponsiveness of animals during tonic immobility is due to sensory or motor inhibition. Specifically, we exposed domestic chicks to an auditory imprinting stimulus during tonic immobility. Seventy-five White Leghorn chicks were tested in 1 of 5 conditions: (1) immobilized and imprinted; (2) restrained but not immobilized, and imprinted; (3) imprinted only; (4) immobilized but not imprinted; and (5) neither immobilized nor imprinted. Chicks in the 1st 3 groups all imprinted to the same degree in that they did not differ in median run times in a straight alley with the imprinting stimulus. These results demonstrate that chicks do process auditory stimuli during tonic immobility and the reduced responsiveness observed during tonic immobility is due mainly to motor inhibition.
在本研究中，我们试图确定动物在紧张性不动期间的特征性无反应是由于感觉抑制还是运动抑制。具体而言，我们在紧张性不动期间让家鸡接触听觉印记刺激。75只白来航鸡在5种条件中的1种下接受测试：（1）固定并进行印记；（2）受约束但未固定，并进行印记；（3）仅进行印记；（4）固定但未进行印记；以及（5）既未固定也未进行印记。前三组中的小鸡在相同程度上都形成了印记，因为它们在有印记刺激的直道上的中位奔跑时间没有差异。这些结果表明，小鸡在紧张性不动期间确实会处理听觉刺激，并且在紧张性不动期间观察到的反应性降低主要是由于运动抑制。
