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Bulimia nervosa is a complex and severe eating disorder characterized by a cyclical pattern of binge-and-purge eating pattern. It generally involves an episode of binge eating, followed by compensatory behaviors such as vomiting, excessive exercise, laxative use, or fasting, to prevent weight gain. Despite often maintaining a normal weight, individuals with bulimia are intensely preoccupied with their body image and harbor an overwhelming fear of gaining weight. This can contribute to the...
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Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
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While variables are sometimes correlated because one does cause the other, it could also be that some other factor, a confounding variable, is actually causing the systematic movement in our variables of interest. For instance, as sales in ice cream increase, so does the overall rate of crime. Is it possible that indulging in your favorite flavor of ice cream could send you on a crime spree? Or, after committing crime do you think you might decide to treat yourself to a cone?
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Related Experiment Video

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Control of Eating Behavior Using a Novel Feedback System
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Memory and eating: A bidirectional relationship implicated in obesity.

Marise B Parent1, Suzanne Higgs2, Lucy G Cheke3

  • 1Neuroscience Institute & Department of Psychology, Georgia State University, Box 5030, Atlanta, GA 30303-5030, United States.

Neuroscience and Biobehavioral Reviews
|November 23, 2021
PubMed
Summary
This summary is machine-generated.

Memory and eating have a two-way connection. Impaired memory affects hunger cues and meal recall, potentially leading to overeating and obesity. This cycle disrupts brain function, worsening eating behaviors.

Keywords:
AmnesiaAppetiteCognitionDietEpisodic memoryFood intakeHippocampusInteroception

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Area of Science:

  • Neuroscience
  • Behavioral Science
  • Metabolic Research

Background:

  • Amnesia impacts hunger and satiety cue processing, meal memory, and consumption.
  • Obesity is linked to hippocampal memory disturbances and impaired processing of eating cues.
  • Meal-related memory influences subsequent eating behaviors in healthy individuals.

Purpose of the Study:

  • To review evidence on the bidirectional relationship between memory and eating.
  • To explore the neural mechanisms underlying eating behaviors and disorders.
  • To understand how diet-induced obesity may be caused and maintained by memory-related feedback loops.

Main Methods:

  • Review of existing human and rodent studies on memory and eating.
  • Analysis of neurobiological evidence from rodent models.
  • Examination of the role of the hippocampus in regulating ingestive behavior.

Main Results:

  • Disrupted hippocampal function due to excess intake can exacerbate overeating.
  • Neural activity in the dorsal hippocampus is crucial for meal-related memory's control over intake.
  • Ventral hippocampus pathways regulate energy status cues and learned eating behaviors, disrupted by hypercaloric diets.

Conclusions:

  • Diet-induced obesity may result from a cycle where overconsumption impairs hippocampal function, leading to further intake.
  • Understanding these neural mechanisms is key to treating eating disorders and obesity.
  • This research highlights the brain's role in controlling eating and the impact of memory on metabolic health.