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Regulation of Food Intake01:30

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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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Gastric emptying occurs when the stomach gradually releases chyme into the duodenum. When the stomach is distended, it triggers the release of gastrin, a hormone that promotes gastric acid secretion to aid in digestion. Additionally, stomach distension contributes to peristaltic waves that propel gastric contents toward the pyloric region. The gastroenteric reflex, on the other hand, primarily stimulates peristalsis in the intestines, facilitating the movement of contents further along the...
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Studying Food Reward and Motivation in Humans
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Ghrelin: A link between memory and ingestive behavior.

Ted M Hsu1, Andrea N Suarez2, Scott E Kanoski1

  • 1Human and Evolutionary Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA; Neuroscience Program, University of Southern California, Los Angeles, CA, USA.

Physiology & Behavior
|April 14, 2016
PubMed
Summary
This summary is machine-generated.

Ghrelin, a hunger hormone, plays a key role in learned feeding behaviors by linking memory and appetite. Understanding this neurobiology is crucial for addressing obesity and metabolic deficits.

Keywords:
AppetiteCephalicGHSRHippocampusLearningObesity

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Area of Science:

  • Neurobiology
  • Behavioral Science
  • Endocrinology

Background:

  • Feeding behavior is complex, influenced by learned associations and cues.
  • Excessive feeding, linked to obesity, may involve conditioned responses to food-related cues.
  • Understanding the neurobiology of learned feeding is critical.

Purpose of the Study:

  • To review the role of ghrelin in learned feeding behaviors.
  • To explore the neurobiological mechanisms underlying conditioned feeding.
  • To highlight the link between memory processes and appetite control.

Main Methods:

  • Review of existing literature on ghrelin, learning, memory, and feeding behavior.
  • Analysis of neurobiological frameworks for conditioned feeding.
  • Discussion of hippocampal-dependent memory and cephalic endocrine responses.

Main Results:

  • Ghrelin acts as a biological substrate linking memory and feeding control.
  • Conditioned cephalic ghrelin secretion influences hippocampal neurons.
  • This signaling engages lateral hypothalamus circuitry to drive learned feeding.

Conclusions:

  • Ghrelin is integral to the neurobiological basis of conditioned feeding behavior.
  • Learned associations and memory processes, particularly hippocampal, significantly impact food intake.
  • This framework aids in understanding and potentially managing obesity-related feeding disorders.