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The British Journal of Psychiatry (2003) 182: 525-531
© 2003 The Royal College of Psychiatrists

Engagement of brain areas implicated in processing inner speech in people with auditory hallucinations

SUKHWINDER S. SHERGILL, MRCPsych, MICHAEL J. BRAMMER, PhD, RIMMEI FUKUDA, MD, STEVEN C. R. WILLIAMS, PhD, ROBIN M. MURRAY, FRCPsych and PHILIP K. McGUIRE, MRCPsych

Institute of Psychiatry, London, UK

Correspondence: Dr S. S. Shergill, Division of Psychological Medicine, Institute of Psychiatry, De Crespigny Park, Denmark Hill, London SE5 8AF, UK. Tel: 020 7848 0350; fax: 020 7848 0350; e-mail: s.shergill{at}iop.kcl.ac.uk

Declaration of interest None.

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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Highlights of this issue

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BJP 2003 182: 465-a23. [Full Text]  

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