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24 May 2011
OCD gets chicken-egg explanation

Researchers from the University of Cambridge are saying that with OCD, the compulsions themselves might be the precursors to the disorder, and that obsessions may simply be the brain's way of justifying these behaviors.

The study, in the American Journal of Psychiatry, provides important insight into how the debilitating repetitive behavior of OCD develops and could lead to more effective treatments and preventative measures for the disorder.

The research tested 20 patients suffering from the disorder and 20 control subjects (without OCD) on a task which looked at the tendency to develop habit-like behavior. Subjects were required to learn simple associations between stimuli, behaviors and outcomes in order to win points on a task.

The researchers found that patients suffering from the disorder had a tendency to continue to respond regardless of whether or not their behavior produced a desirable outcome. In other words, this behavior was habitual. The discovery that compulsive behavior - the irresistible urge to perform a task - can be observed in the laboratory, in the absence of any related obsessions, suggests that compulsions may be the critical feature of OCD.

Indeed, one of the most effective treatments for OCD is cognitive behavioral therapy (CBT), which typically involves a method known as "exposure and response prevention". This technique challenges patients to discontinue compulsive responding. The effectiveness of this treatment is compatible with the idea that compulsions, and not obsessions, are critical in OCD. Once the compulsion is stopped, the obsession tends to fade away.

"It has long been established that humans have a tendency to 'fill in the gaps' when it comes to behavior that cannot otherwise be logically explained," said researcher Claire Gillan. "In the case of OCD, the overwhelming urge to senselessly repeat a behavior might be enough to instill a very real obsessive fear in order to explain it."

Related:
Internet Addiction: Caught In The Net
New clues to the calming effects of self-harm
Psychiatric disorders an ongoing issue after anorexia

Source: University of Cambridge


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