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Related Concept Videos

Regulation of Food Intake01:30

Regulation of Food Intake

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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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Diencephalon: Hypothalamus and Coordination01:23

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The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
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Neural Regulation01:37

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Hormonal Regulation01:40

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Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
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Primary Motives: Hunger and Thirst01:25

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Hunger and thirst are fundamental physiological drives crucial for maintaining homeostasis and ensuring the survival of both humans and animals. These drives are regulated through complex interactions between the brain, hormones, and sensory receptors.
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The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the...
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Control of Eating Behavior Using a Novel Feedback System
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Higher-Order Inputs Involved in Appetite Control.

Estefania P Azevedo1, Violet J Ivan1, Jeffrey M Friedman2

  • 1Laboratory of Molecular Genetics, The Rockefeller University, New York, New York.

Biological Psychiatry
|October 1, 2021
PubMed
Summary
This summary is machine-generated.

The brain

Keywords:
AppetiteCortexEating disordersHypothalamusObesitySubcortical areas

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Area of Science:

  • Neuroscience
  • Appetite Regulation
  • Eating Disorders

Background:

  • Eating disorders like anorexia nervosa and obesity stem from disrupted appetite control.
  • The hypothalamus is a key brain region regulating appetite, interacting with other areas.
  • Genetic, physiological, and environmental factors influence appetite regulation.

Purpose of the Study:

  • To review the neural pathways connecting the hypothalamus to the limbic system and cortex.
  • To explore how higher-order brain centers regulate appetite.
  • To understand how altered brain connections contribute to maladaptive eating behaviors.

Main Methods:

  • This review synthesizes existing research on neural circuits involved in appetite control.
  • Focuses on functional and anatomical projections between the hypothalamus, limbic system, and cortex.
  • Examines neuronal mechanisms in higher-order centers regulating feeding behavior.

Main Results:

  • The hypothalamus integrates sensory and emotional information for feeding decisions.
  • Connections between cortical and subcortical areas and the hypothalamus are crucial.
  • Altered neural pathways are implicated in the pathogenesis of eating disorders.

Conclusions:

  • Understanding neural control of appetite is vital for addressing eating disorders.
  • The interplay between the hypothalamus and higher brain centers is key to appetite regulation.
  • Dysfunctional neural circuits contribute to maladaptive eating behaviors and disorders.