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Practically all the chapters in this volume present. It is possible that the cerebral contain new and previously unpublished system has a neurotransmitter role, espe research reports and reviews on the phys cially as intracerebral angiotensin-induced iological mechanisms which induce drink drinking seems to depend on catecholami ing of non-nutritive fluids. Though based nergic, perhaps dopaminergic, systems. on a Symposium on Thirst we have not However, we were also reminded that called the volume by this title because there are cholinergic drinking systems in thirst as such, a subjective human sensa the brain, at least of the rat, and that tion, is not in fact discussed in these pages. vaso...
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Motivation addresses a central problem in psychology: Why does an animal's behavior fluctuate in the face of an unaltered environment? In a sense this is the opposite of the question from which work on motivation began, and for which Claude Bernard invented the concept of the fixity of the internal milieu: How does an animal maintain constancy in the face of a fluctuating environment? Dealing with motivation has become extremely complex as new experiments, phenomena, and theories have extended the concept. This book embodies some of the ways in which work on motivation is currently proceeding. One of the major changes has been the recognition that motivation cannot be explained without an un...
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