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Turning up the volume: BNST couples internal state to consumption
1Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA; Institute for Obesity, Diabetes, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; BrainBodyBiome Center, University of Pennsylvania, Philadelphia, PA 19014, USA.
Cell
|November 27, 2025
Summary
Scientists discovered a brain circuit that acts as a consummatory dial, regulating how much we eat based on our internal state. This finding also reveals a generalized intensity dial that influences overall food consumption.
Area of Science:
- Neuroscience
- Neurobiology
- Sensory systems
Background:
- Understanding the neural mechanisms of appetite control is crucial for addressing obesity and eating disorders.
- Taste perception plays a significant role in regulating food intake.
- Previous research has identified pathways for taste signaling but lacked a comprehensive understanding of consumption level regulation.
Purpose of the Study:
- To identify the specific brain circuits controlling ingestion levels.
- To investigate how taste information is processed to modulate consumption.
- To uncover the mechanisms behind state-dependent regulation of feeding behavior.
Main Methods:
- Utilized advanced neuroimaging techniques to trace neural pathways.
- Employed genetic manipulation in model organisms to identify key neurons.
- Conducted behavioral experiments to assess feeding responses under different physiological states.
Main Results:
- Identified a novel "consummatory dial" in the brain that regulates ingestion.
- Demonstrated that this dial operates in a state-dependent manner, adjusting intake based on internal cues.
- Discovered a generalized "intensity dial" that broadly modulates consumption based on taste information flow.
Conclusions:
- The brain possesses specific circuits that precisely control the quantity of food consumed.
- These circuits integrate internal state information with sensory input to fine-tune feeding behavior.
- The identified dials offer potential targets for therapeutic interventions related to appetite and eating disorders.
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