D2 Neurons Tell Brain When To Stop Drinking

Posted: Jul 8 2016, 3:01am CDT | by , Updated: Jul 8 2016, 3:04am CDT, in News | Latest Science News

D2 Neurons tell Brain When to Stop Drinking
Photo Credit: Getty Images

It is possible to influence drinking behavior by activating particular neurons in brain, suggests a new study.

The researchers earlier showed that alcohol consumption alters the physical structure and function of neurons in the dorsomedial striatum -- a part of the brain that is believed to contribute directly to decision-making, especially to action selection and initiation.

Essentially, they found that activation of one type of neuron, called D1, determines whether one drink leads to two.

Now, they have discovered the neurons that tell us to stop.

These neurons can be thought of like a tree, with many branches, and many small protrusions, or spines, coming off of them.

Each neuron has one of two types of dopamine receptors -- D1 or D2 -- and so can be thought of as either D1 or D2 neurons.

When D2 neurons are activated, they discourage action -- telling you to wait, to stop, to do nothing.

"At least from the addiction point of view, D2 neurons are good. When they are activated, they inhibit drinking behavior, and therefore activating them is important for preventing problem drinking behavior," said Jun Wang from Texas A&M Health Science Center College of Medicine in the US.

Even in individuals without alcoholism, D2 neurons tend to become deactivated when we drink too much, the researchers said.

But by manipulating the activity of these neurons, the researchers were actually able to change the alcohol-drinking behavior of animals who had been “trained” to seek alcohol.

By activating D2 neurons, they were able to decrease alcohol consumption, and the more the D2 neurons were activated, the greater the effect is likely to be.

The findings were published in the journal Biological Psychiatry.

How to activate D2 neurons?
This could be done through drugs or electrical stimulation, but such methods are still a long way from even getting tested on humans.

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