Preference differences for sucrose solutions in young and aged squirrel monkeys

Abstract

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Feed efficiency, food choice, and food reward behaviors in young and old Fischer rats

“…We found that the lick rate during the first minute was significantly decreased in older rats, suggesting a decrease in the hedonic impact of sucrose and corn oil in old rats. However, given the failure to demonstrate such a deficit in the more specific tests for hedonic impact discussed above, the decrease could also be due to the age-related decline in orolingual motor performance observed; consistent with other reports in F344 rats (Stanford et al, 2003), and aged monkeys (Michels et al, 1988). Alterations in orolingual motor function including dysarthria, dysphagia, and masticatory deficits have been linked to morbidity and mortality in the elderly (Baum and Bodner, 1983; Lieu et al, 2001).…”

Additivity of taste-specific effects of sucrose and quinine: Microstructural analysis of ingestive behavior in rats.

“…The effects of concentrations of various carbohydrate solutions have been studied under several conditions, such as sham feeding (Davis & Smith, 1990, 1992), dopamine (DA) blocking (Gramling, Fowler, & Collins, 1984), and administration of putative satiety hormones (cholecystokinin and bombesin; Hsiao & Spencer, 1983). The behavioral adjustments for sucrose stimuli have been shown to be different between young and old squirrel monkeys (King, Hsiao, & Leeming, 1986; Michels, King, & Hsiao, 1988). Along with licking-response patterns, the force of tongue extension has been directly measured to study the effect of DA blocking with haloperidol (Fowler & Mortell, 1992).…”