Newly Discovered Brain Cells Shed Light on Food Aversion and Nausea

Many individuals experience a loss of appetite when feeling unwell. Researchers at the Max Planck Institute for Biological Intelligence in Germany conducted a study on mice to identify the specific brain regions responsible for food aversion.

The study, published on March 27 in the journal Cell Reports, reveals the existence of a previously unidentified cluster of brain cells that become active when mice feel sick, as opposed to when they are simply full or have ceased eating. This finding indicates that the brain circuits involved in processing satiety and nausea are distinct.

Through the artificial activation of these neurons, the scientists discovered that even highly famished mice refused to eat. To delve deeper into the role of these neurons, the researchers administered a chemical that induces nausea to mice and monitored their brain activity. This confirmed that the identified neurons were indeed active when the mice experienced nausea. Furthermore, inhibiting the activity of these neurons caused the mice to resume eating despite feeling nauseated.

The research team emphasizes the significance of comprehending the brain circuits responsible for inducing nausea. Such understanding is crucial for effectively addressing and treating eating disorders, particularly in patients with obesity and anorexia.