Abstract：
:The objective of this work was to study the effect of early weaning on alimentary preference for the macronutrients protein, carbohydrate and fat in adult rats. Male Wistar rat pups were weaned by separation from the mother at 15 (D15) or 30 (D30) days old. Body weight and food intake were measured every 30 days until pups were 150 days old. At 110 days of age, the alimentary preference was evaluated for 1h on 3 consecutive days. At 120 days of age, the palatable diet test was conducted during 3 consecutive 24-h periods. Body weight and food intake were not altered, but early weaning in rats induced an alimentary preference to fat and hyperphagia of a palatable diet. In conclusion, early weaning, although did not modify body weight or basal food intake, promoted an increased preference for palatable and fatty foods. This demonstrates that early weaning is not capable of promoting perceptible alterations of alimentary behavior under normal laboratory conditions. However, in the presence of a stimulating factor such as a choice of nutrients or a palatable diet, a possible latent effect on dietary preferences may become apparent. Over the long term, this preference for foods with high caloric density can lead to obesity and metabolic perturbations.
journal_name
Behav Processesjournal_title
Behavioural processesauthors
dos Santos Oliveira L,de Lima DP,da Silva AA,da Silva MC,de Souza SL,Manhães-de-Castro Rdoi
10.1016/j.beproc.2010.09.005subject
Has Abstractpub_date
2011-01-01 00:00:00pages
75-80issue
1eissn
0376-6357issn
1872-8308pii
S0376-6357(10)00245-7journal_volume
86pub_type
杂志文章abstract：:Three mentally retarded humans first acquired a simple discrimination: Simultaneously displayed visual stimuli A1 and A2 functioned as S+ and S-, respectively. The subjects also acquired a conditional discrimination, learning to select visual stimuli B1 and B2 conditionally upon A1 and A2, respectively. Then, B1 and B...
journal_title：Behavioural processes
pub_type： 杂志文章
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journal_title：Behavioural processes
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journal_title：Behavioural processes
pub_type： 杂志文章
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journal_title：Behavioural processes
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journal_title：Behavioural processes
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pub_type： 杂志文章
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journal_title：Behavioural processes
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journal_title：Behavioural processes
pub_type： 杂志文章
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更新日期：1991-12-01 00:00:00
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pub_type： 杂志文章
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更新日期：1989-12-01 00:00:00
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journal_title：Behavioural processes
pub_type： 杂志文章
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journal_title：Behavioural processes
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journal_title：Behavioural processes
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journal_title：Behavioural processes
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abstract：:Although the extensive lines of research on delay and/or probability discounting have greatly expanded our understanding of human decision-making processes, the relation between these two phenomena remains unclear. For example, some studies have reported robust associations between delay and probability discounting, w...
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abstract：:Interruptions and unfamiliar events (distracters) during a timed signal disrupt (delay) timing in humans and other animals. We hypothesized that repeated exposure to a stimulus may reduce its subsequent time-disrupting properties. To test this hypothesis rats were trained in a reversed peak-interval (RPI) procedure, i...
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