Hypothalamic hyperphagia despite imposed diurnal or nocturnal feeding and drinking rhythms.

Physiology & Behavior
R M GoldG Kapatos

Abstract

Rats normally do most of their eating at night. When ad lib fed rats are made hyperphagic with lesions or parasagittal hypothalamic knife cuts the increases in eating occur primarily during the day. This suggests that a disruption of circadian rhythms may mediate the overeating. However, when knife cut rats were food and water deprived all day excessive eating occurred at night. Similarly, when they were deprived all night overeating occurred during the day. Under both conditions od deprivation the food intakes and rapid weight gains of the ad lib fed knife cut group were defended. It was concluded that: (1) in hypothalamic hyperphagia either the excessive food intake or the excessive weight gain is defended when food and water are available only half of each day, and (2) disruption of nocturnal feeding and drinking rhythms is not the cause of hypothalamic hyperhagia.

References

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Citations

Apr 1, 1977·Physiology & Behavior·E E Becker, J A Grinker
Jan 1, 1980·Physiology & Behavior·T H Kramer, R M Gold
Jan 1, 1985·Physiology & Behavior·A P JonesA Sylvan
Mar 1, 1994·Physiology & Behavior·A Sclafani
Jan 1, 1980·Neuroscience and Biobehavioral Reviews·S Armstrong
Jan 1, 1981·Neuroscience·F K StephanR L Moss

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