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Unformatted text preview: experimental animals. Experiments performed in the 1920s showed a remarkable behavioral transformation in cats or dogs when this procedure was performed. Animals that were not easy to provoke prior to the surgery flew into a state of violent rage with the least provocation after the surgery. Sham rage is observed if the anterior hypothalamus is destroyed along with the cortex, but it is not seen if the lesion is extended to include the posterior half of the hypothalamus. Therefore, the posterior hypothalamus is particularly important for the expression of anger and aggression in animals and is normally inhibited by the cortex. We do not know whether or not the animals feel angry, because feelings are subjective experiences that can be reported verbally by humans but not by animals. t...
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- Spring '08