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Increased cerebral blood flow during m-CPP exacerbation of obsessive- compulsive disorder
The Journal of Neuropsychiatry and Clinical Neurosciences 1995;7:485-490.
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Abstract

The partial serotonin agonist m-chlorophenyl-piperazine (m-CPP) has been reported to increase obsessive-compulsive symptoms in some patients with obsessive-compulsive disorder (OCD). The authors investigated the underlying physiological mechanisms of this variable exacerbation by imaging regional cerebral blood flow with the planar xenon-133 method after administration of oral m-CPP (0.5 mg/kg). Seven patients who responded to m-CPP with symptomatic exacerbation had a marked increase in global cortical perfusion (18.1%), in contrast to the remaining 7 nonresponders to m-CPP, who showed no change. These results suggest that m-CPP exacerbation of OCD symptoms is associated with increased cortical blood flow.

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