Abstract

The diagnostic boundary between schizophrenia and bipolar disorder can be unclear, particularly with early onset. We assessed if emotion brain circuits differentiate psychosis versus mania symptoms in a series of six early onset patients. Symptoms were dissociated by direction, awareness condition, and brain regions. Greater psychosis symptoms were correlated with greater prefrontal, anterior cingulate, amygdala, and fusiform face area activation during masked fear processing. By contrast, greater mania symptoms were correlated with less amygdala activation during unmasked fear and happy processing. This suggests emotion dysfunction in schizophrenia versus bipolar disorder may arise from partially distinct neural mechanisms of susceptibility.

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