Abstract
The aim of the present study was to investigate the influence of age and hepatic branch vagotomy on the night/day distribution of food intake in male rats. Food intake of young (age: 2 months) and aged (age: 13.5 months) hepatic branch vagotomized (HBV) and sham-vagotomized (SV) rats was measured at intervals of 6 h during the 12 h dark and the 12 h light phase. The results show that in rats the night/day ratio of food intake decreases with age and is not affected by hepatic branch vagotomy. However, the time-course of spontaneous diurnal food intake was influenced by hepatic branch vagotomy. The change in the night/day distribution of food intake might be due to age-related changes in the nucleus suprachiasmaticus of the hypothalamus.
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