Journal
BRITISH JOURNAL OF PSYCHIATRY
Volume 182, Issue -, Pages 525-531Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1192/bjp.182.6.525
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Background The neurocognitive basis of auditory hallucinations is unclear, but there is increasing evidence implicating abnormalities in processing inner speech. Previous studies have shown that people with schizophrenia who were prone to auditory hallucinations demonstrated attenuated activation of brain areas during the monitoring of inner speech. Aims To investigate whether the same pattern of functional abnormalities would be evident as the rate of inner speech production was varied. Method Eight people with schizophrenia who had a history of prominent auditory hallucinations and eight control participants were studied using functional magnetic resonance imaging while the rate of inner speech generation was varied experimentally Results When the rate of inner speech generation was increased, the participants with schizophrenia showed a relatively attenuated response in the right temporal, parietal, parahippocampal and cerebellar cortex. Conclusions In people with schizophrenia who are prone to auditory hallucinations, increasing the demands on the processing of inner speech is associated with attenuated engagement of the brain areas implicated in verbal self-monitoring.
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