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Meditation May Help Brain Tune Out Distractions

Study Helps Explain Why Meditation Improves Concentration
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WebMD Health News
Reviewed by Laura J. Martin, MD

Nov. 21, 2011 -- People who meditate may be able to use their brain in ways others can't to tune out distractions and focus on the task at hand.

A new study shows that experienced meditators may have less activity in parts of the brain associated with daydreaming and distraction while meditating and in their day-to-day lives.

Researchers say this brain network, known as the "default mode network," has also been linked to anxiety, attention deficit hyperactivity disorder (ADHD), and Alzheimer's disease.

"The default mode is when you ruminate, think about yourself, or daydream," says study researcher Judson Brewer, MD, PhD, medical director of the Yale Therapeutic Neuroscience Clinic. "Everybody has it, but experienced meditators have a different type."

Brewer found that people who meditate are able to link up other parts of their brains to monitor activity in the default mode network that tell them to get back on task when distractions arise and be present in the moment.

The study is published in the Proceedings of the National Academy of Sciences.

Experts say the results help explain the benefits of meditation on concentration and open the door to future research using meditation to treat and potentially prevent a variety of psychiatric and neurological disorders.

Meditation Modifies Brain Networks

In the study, researchers used functional magnetic resonance imaging (fMRI) to analyze brain activity in 12 experienced meditators (more than 10 years of experience practicing mindfulness meditation) and 12 novice meditators. The scans were done as they practiced three different types of mindfulness meditation as well as at rest.

The results showed that experienced meditators had less activity in the default mode network, regardless of the type of meditation they practiced.

In addition, the scans showed that when the default mode network was active, other brain regions responsible for self-monitoring and thought control were also activated in experienced, but not novice meditators.

"This new default mode in meditators has these other components that are monitoring and telling you to get back on task and be present," Brewer tells WebMD.

More Benefits of Meditation

Experts say the findings build on previous studies that have shown meditation can alter brain structure by increasing gray matter density and brain activity to improve concentration.

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