In a study published in the journal Nature Communications, researchers from the University of Arizona found a network of neurons in mice that work with other brain regions to influence eating behaviors and appetite. They believe that identifying its equivalent in the human brain and finding a way to control it can help people who suffer from disease-induced appetite loss or overeating.
The goal of the researchers was to discover which part of the brain controls appetite and if it could be manipulated for the management of disease-induced eating disorders. They zeroed in on a group of neurons found in the amygdala or the brain's emotional hub. The researchers referred to this group as a symphony conductor — a region of the brain that regulates appetite suppression and activation.
To determine whether or not these neurons control eating behavior, the researchers inhibited these neurons in laboratory mice using chemogenetic silencing. This resulted in increased food intake and total eating time. When the researchers reactivated these neurons, it triggered a decrease in appetite.
“By silencing the neurons within the circuit, we can effectively block feeding suppression caused by inflammation to make patients eat more,” said Haijiang Cai, one of the study authors. “We used anorexia for simplification, but for people with obesity, we can activate those neurons to help them eat less. That's the potential impact of this kind of study.”
While everything about eating may sound simple, the researchers believe otherwise. They claim that the hunger people feel stems from the desire to satisfy nutritional deficits or get the reward of eating something delicious. Once a person finds food, he or she checks if it is good before chewing and swallowing. Satisfaction follows after a certain point.
Their findings led the researchers to believe that various parts of the brain coordinate with each other to control each step of the feeding process.
“This circuitry we found is really exciting because it suggests that many different parts of brain regions talk to each other,” Cai said. “We can hopefully find a way to understand how these different steps of feeding are coordinated.”
For the researchers, their next step is to identify the same neuronal network in humans and check if it works the same way. This will then allow them to develop a way to control feeding activities.
Although the study shows that your brain is in command of your appetite, there are still some things that you can do to keep your appetite under control. (Related: Losing weight with appetite suppressing drugs, herbs and macronutrients.)
Learn more about how your mind and body work to influence your activities at MindBodyScience.news.