In schizophrenia, the severity of flat affect correlated significantly with neural activity in several brain areas including the amygdala and parahippocampal region bilaterally. Group comparisons, however, revealed increased activity in the healthy group in the anterior cingulate, right parahippocampal gyrus and multiple visual areas. Both groups exhibited increased brain activity during the perception of emotional faces relative to neutral ones in multiple brain regions, including multiple prefrontal regions bilaterally, the right amygdala, right cingulate cortex and cuneus. Manual segmentation of the amygdala was performed on a structural T1 image.īoth the schizophrenia group and the healthy control group rated the emotional valence of facial expressions similarly. Sad, happy and neutral faces were presented in a pseudo-random order and participants indicated the gender of the face presented. Functional brain imaging studies have observed reduced limbic activity during facial emotion perception but few studies have examined the relation to flat affect severity.Ī total of 26 people with schizophrenia and 26 healthy controls took part in this event-related functional magnetic resonance imaging study. There is a general consensus in the literature that schizophrenia causes difficulties with facial emotion perception and discrimination.
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