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Instinctive and conditioned reactions in cats after removal of amygdaloid nuclei

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Conclusions

Before and after bilateral electrolytic destruction of the amygdala and part of the piriform lobe two forms of food-getting reflexes were studied in cats: a previously developed conditioned reflex (running to a feeding dish and removing the food) and an instinctive reflex (to a living mouse or bird).

  1. 1.

    The food-getting conditioned reflex was restored on the 15th–25th day after extensive destruction of the amygdala, although it then took place more slowly and after a longer latent period. Differentiation was not disinhibited.

  2. 2.

    The instinctive food-getting reaction (to a mouse or bird) was lost in seven cats following total loss of the amygdala and was not restored. In three cats this reaction was preserved. In three cats with partial destruction of the amygdala the instinctive reaction was weakened and exhibited irregularly. In the control animals it was unchanged.

  3. 3.

    The results are discussed from the point of view of the physiological role of the amygdala in the regulation of emotional and feeding behavior.

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  1. Laboratory of Higher Nervous Activity, Institute of Physiology, Academy of Sciences of the Ukrainian SSR, Ukraine

    V. A. Cherkes

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  1. V. A. Cherkes
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Cherkes, V.A. Instinctive and conditioned reactions in cats after removal of amygdaloid nuclei. Neurosci Behav Physiol 1, 418–424 (1967). https://doi.org/10.1007/BF01126534

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