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| Lying under the cerebral hemispheres, at the top of the brain stem, are the reptile brain and the brain of the old mammal, which contain the basic survival programs related to flight from danger, hunger, thirst, procreation and parental care | ||
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| Present |  |
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| Experiments have shown that much of the human repertoire of behavior originates in deeply buried regions of the brain that once directed the business of life for our ancestors. Jastrow |
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| p.v. 02939 |