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What is the brain telling us about the diagnoses of schizophrenia and bipolar disorder?
Date:9/5/2013

differ primarily by degree or are there clear categorical differences? To answer this question, researchers from a large collaborative project called BSNIP looked at a large sample of patients diagnosed with schizophrenia or bipolar disorder, their healthy relatives, and healthy people without a family history of psychiatric disorder.

They used a specialized analysis technique to evaluate the data from their multi-site study, which revealed abnormalities within seven different brain networks. Generally speaking, they found that schizophrenia and bipolar disorder showed similar disturbances in cortical circuit function. When differences emerged between these two disorders, it was usually because schizophrenia appeared to be a more severe disease. In other words, individuals with schizophrenia had abnormalities that were larger or affected more brain regions. Their healthy relatives showed subtle alterations that fell between the healthy comparison group and the patient groups.

The authors highlight the possibility that there is a continuous spectrum of circuit dysfunction, spanning from individuals without any familial association with schizophrenia or bipolar to patients carrying these diagnoses. "These findings might serve as useful biological markers of psychotic illnesses in general," said Khadka.

Krystal agreed, adding, "It is evident that neither our genomes nor our brains have read DSM-V in that there are links across disorders that we had not previously imagined. These links suggest that new ways of organizing patients will emerge once we understand both the genetics and neural circuitry of psychiatric disorders sufficiently."


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Contact: Jordi van de Weerd
j.weerd@elsevier.com
Elsevier
Source:Eurekalert

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