Suvorov N F, Danilova L K, Shefer S I, Shuvaev V T
Neurosci Behav Physiol. 1985 Nov-Dec;15(6):494-501. doi: 10.1007/BF01184260.
The destruction of the amygdala in cats and dogs causes the animals to stop responding adequately to signals of various biological significance; the curves of change in the amplitude and probability of appearance of EPs in the sensorimotor cortex lose the maxima characteristic of intact animals at frequencies of 0.8, 1.6, and in the band from 2.0 to 3.0 kHz, which are the format frequencies of certain communicational signals in cats. The assumption of a signal (food) significance by an indifferent stimulus, earlier without any biological meaning, finds reflection in the neuronal activity of the amygdala, which begins to respond to this signal as if to an unconditioned stimulus. On the basis of the above factors, the role of the amygdala is discussed in the evolution of the biological significance of conditioned stimuli and the differentiation of the afferent influences that reach it.
猫和狗的杏仁核被破坏后，会导致动物对各种具有生物学意义的信号不再能做出充分反应；感觉运动皮层中诱发电位（EP）的振幅和出现概率的变化曲线，在0.8、1.6以及2.0至3.0千赫兹频段（这些是猫的某些交流信号的形式频率）时，失去了正常动物所特有的最大值。原本无任何生物学意义的中性刺激被赋予信号（食物）意义后，会在杏仁核的神经元活动中有所体现，此时杏仁核开始像对非条件刺激一样对该信号做出反应。基于上述因素，讨论了杏仁核在条件刺激生物学意义的进化以及到达杏仁核的传入影响的分化过程中的作用。
