Cited by 30Hallucinations in medical conditionsSchizophrenia research and treatmentHemispheric Asymmetry in Neuroscience

Language production in the non-dominant hemisphere as a potential source of auditory verbal hallucinations

Sommer, I. E., Diederen, K. M.·2009·Brain

Abstract

Sir, in his comment, Dr Craig (2009a) raises an interesting hypothesis. He poses that an important aspect of auditory verbal hallucinations, namely the experience of the alien or non-self origin, results from an imbalance between the anterior cingulated gyrus and the anterior insula in the right hemisphere. This non-self aspect of auditory verbal hallucinations is an important and characteristic factor inducing patients to attribute the voices they experience to an external source, be it humans, spirits or demons. This attribution to a non-self source increases fear and delusional belief and greatly contributes to psychopathology (García-Montes et al., 2004; Engh et al., 2009). Understanding the neurobiology of the non-self aspect would therefore be helpful in elucidating the pathophysiology of auditory verbal hallucinations and perhaps, as Craig stated, have consequences for future therapy. The lack of activity in the right anterior cingulated cortex during the experience of auditory verbal hallucinations was correctly observed by Craig. In fact, post hoc region of interest (ROI) analysis of this area demonstrated no significant activation, neither in the left nor in the right anterior cingulated gyrus, although there was bilateral activity in the middle cingulated region and the superior frontal gyri during auditory verbal hallucinations. In contrast, the verbal fluency task induced robust activity in the bilateral anterior cingulated area (left more than right) in the same subjects. We agree with Craig that the striking absence of anterior cingulated activity during auditory verbal hallucinations may reflect the lack of conscious control the patients had over these experiences.

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Crossref · 10.1093/brain/awp040

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Authors
Sommer, I. E., & Diederen, K. M.
Corresponding author
Sommer, I. E.
Venue
Brain
Published
2009-03-31
Volume
132
Issue
10
Pages
e124-e124
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W2129785568
Cited by
30
References
30
Citations by year
2024: 1 · 2023: 1 · 2022: 4 · 2021: 1 · 2018: 2 · 2015: 2 · 2013: 4 · 2012: 2
FWCI
2.42
Type
journal article
Language
en
Open access
closed
Locations
  • Brain (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Hallucinations in medical conditions
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Hemispheric Asymmetry in Neuroscience
Keywords
auditory verbal hallucinations, non-dominant hemisphere, right hemisphere, anterior cingulate cortex, anterior insula, verbal fluency, conscious control

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