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Related Concept Videos

Brain Imaging01:14

Brain Imaging

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
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Functional Interrogation of Adult Hypothalamic Neurogenesis with Focal Radiological Inhibition
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Changes in brain activity after weight loss.

A M van Opstal1, M A Wijngaarden2, J van der Grond1

  • 1Department of Radiology Leiden University Medical Center Leiden The Netherlands.

Obesity Science & Practice
|November 6, 2019
PubMed
Summary
This summary is machine-generated.

Weight loss reduces brain activity in areas controlling eating behavior and reward processing in obese individuals. These changes suggest that obesity-related neural alterations may be reversible with weight reduction.

Keywords:
Diet interventionfunctional brain responsesobesityweight loss

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Area of Science:

  • Neuroscience
  • Metabolic research
  • Obesity research

Background:

  • The brain's regulatory role in energy homeostasis, eating behavior, and weight control is increasingly acknowledged.
  • Individuals with obesity often exhibit heightened brain activity in neuronal networks associated with homeostatic and hedonic responses.
  • The impact of dietary interventions on these obesity-associated functional brain changes remains largely unexplored.

Purpose of the Study:

  • To investigate the effects of prolonged fasting and weight loss on neuronal brain activity in individuals with obesity.
  • To determine if functional brain changes in obesity are influenced by weight reduction interventions.

Main Methods:

  • Resting-state functional magnetic resonance imaging (fMRI) was employed to assess whole-brain activity.
  • Brain imaging was conducted on 14 participants with obesity (BMI 35.2 ± 1.2 kg/m²) under three conditions: overnight fast, 48-hour prolonged fast, and after an 8-week weight loss intervention.

Main Results:

  • An 8-week weight loss intervention led to a decrease in Blood-Oxygen-Level-Dependent (BOLD) signal in brain regions critical for salience, sensory-motor, and executive control.
  • The observed reduction in BOLD signal intensity correlated significantly with changes in leptin levels and body mass index.

Conclusions:

  • Weight loss interventions demonstrably reduce neural activity within brain areas implicated in feeding behavior and reward processing.
  • These findings suggest that obesity-related alterations in brain activity are linked to excessive body weight and can be modified through weight loss.