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Postprandial thermogenesis and conditioned taste aversion or preference

S Amaro1, M Monda, M P Pellicano

  • 1Dipartimento di Fisiologia Umana e Funzioni Biologiche Integrate F. Bottazzi, II Università degli Studi di Napoli, Italy.

Physiology & Behavior
|September 1, 1994
PubMed
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Conditioned taste aversion significantly increased postprandial thermogenesis in rats, affecting autonomic nervous system responses. This suggests learned food aversions can alter metabolic rate and energy expenditure.

Area of Science:

  • Physiology
  • Neuroscience
  • Nutrition Science

Background:

  • Postprandial thermogenesis is regulated by the autonomic nervous system.
  • Alimentary conditioned stimuli can modulate sympathetic and parasympathetic activity.
  • Conditioned taste aversion is a learned response to avoid foods associated with negative experiences.

Purpose of the Study:

  • To investigate the impact of conditioned taste aversion on postprandial thermogenesis in rats.
  • To assess how learned food aversions influence metabolic rate and energy expenditure.
  • To explore the role of the autonomic nervous system in mediating these effects.

Main Methods:

  • Rats were divided into control and treated groups, exposed to different diets (standard, thiamine-free, thiamine-rich) with distinct tastes.

Related Experiment Videos

  • Treated rats underwent a regimen inducing conditioned taste aversion to a thiamine-free diet.
  • Postprandial oxygen consumption rate and brown adipose tissue temperature were measured after test meals of familiar diets.

    • Main Results:

    • Treated rats exhibited a significantly higher increase in oxygen consumption rate compared to controls.
    • Intake of the thiamine-free diet by treated rats resulted in a lower increase in oxygen consumption compared to other diets.
    • Brown adipose tissue temperature increased more in treated rats, but less so after consuming the thiamine-free diet.

    Conclusions:

    • Conditioned taste aversion can enhance postprandial thermogenesis.
    • Learned food aversions may alter autonomic nervous system control over metabolic rate.
    • Dietary choices influenced by learned aversions can modulate energy expenditure.