Hormonal
Peripheral ghrelin increases food intake by binding to GHSR receptors in the ventral tegmental area (VTA), thereby increasing dopamine neuron firing rates and synaptic plasticity.
This research highlights that hunger is driven by a specific hormonal signal (ghrelin) that directly activates your brain's reward system (VTA). Understanding this biological mechanism can help shift the perspective from 'willpower' to managing biological signals, such as through scheduled eating or managing environmental cues that trigger these pathways.
Here we show that in mice and rats, ghrelin bound to neurons of the VTA, where it triggered increased dopamine neuronal activity, synapse formation, and dopamine turnover in the nucleus accumbens in a GHSR-dependent manner.
Why this rating
High-quality animal studies with knockout models and direct electrophysiological recordings.
Source
Ghrelin modulates the activity and synaptic input organization of midbrain dopamine neurons while promoting appetite
Alfonso Abizaid et al. · Journal of Clinical Investigation · 2006
DOI 10.1172/jci29867
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