Neuroscience and appetitive behavior research: 25 years

Neuroscience techniques have made major contributions to the understanding of appetitive behavior. Highlights in six areas are summarized to illustrate progress during the 25 years of the Columbia Appetitive Behavior Seminar: (1) discovery of angiotensin and aldosterone in the control of thirst and salt appetite; (2) electrophysiological decoding of chemoreceptive information in the brain; (3) a new foundation in the hypothalamus built on peptides, such as neuropeptide Y and galanin, interacting with monoamines and steroids in the control of appetite for macronutrients; (4) discovery of numerous peptides that mediate and integrate satiety, such as cholecystokinin, insulin, leptin and enterostatin, and other systems that suppress eating during illness; (5) better understanding of appetite suppressant drugs, and (6) exploration of a circuit that translates hypothalamic signals into behavioral action through connections to brainstem reflex arcs and forebrain instrumental response systems.