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Scientists Pinpoint How Deep Brain Stimulation Eases OCD
Date:2/25/2013

By Amanda Gardner
HealthDay Reporter

SUNDAY, Feb. 24 (HealthDay News) -- Deep brain stimulation has helped people with severe obsessive-compulsive disorder, and new research begins to explain why.

A Dutch study appearing in the Feb. 24 online issue of the journal Nature Neuroscience found the procedure essentially restored normal function in a part of the brain called the nucleus accumbens.

The nucleus accumbens "is part of a greater brain network," explained study author Dr. Martijn Figee. "This network is involved in motivation and the processing of rewards, and its activity is disturbed in [obsessive-compulsive disorder], probably explaining why [patients] are stuck in pathological behaviors at the cost of healthy ones."

So, obsessive-compulsive disorder (OCD) is essentially the result of faulty wiring in the brain.

It's not so much a disorder of a specific part of the brain than it is a "disorder of neurocircuitry," explained Dr. Brian Snyder, director of functional and restorative neurosurgery at Winthrop University Hospital in Mineola, N.Y.

About 1 percent of U.S. adults suffer from the condition, which involves unwanted, intrusive thoughts or obsessions that then spur compulsive behavior.

While a person without OCD might momentarily worry that he or she has forgotten to lock the door, that thought is quickly balanced by the realization that, yes, the door has indeed been locked.

For a person with OCD, on the other hand, the thought that the door is unlocked will recur and fall into a repetitive pattern of thinking (obsession) and checking to make sure the door is locked (compulsion).

Dr. Wayne Goodman, professor and chair of psychiatry at Mount Sinai Hospital in New York City described OCD as a kind of "reverberating circuit."

Deep brain stimulation (DBS), which is widely used for severe Parkinson's and experimentally to treat major depression, has limited
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