Interaction of language, auditory and memory brain networks in auditory verbal hallucinations

Ćurčić-Blake, Branislava; Ford, Judith; Hubl, Daniela; Orlov, Natasza D.; Sommer, Iris E.; Waters, Flavie; Allen, Paul; Jardri, Renaud; Woodruff, Peter W.; Olivier, David; Mulertl, Christoph; Woodward, Todd S.; Aleman, André (2017). Interaction of language, auditory and memory brain networks in auditory verbal hallucinations. Progress in neurobiology, 148, pp. 1-20. Elsevier 10.1016/j.pneurobio.2016.11.002

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Auditory verbal hallucinations (AVH) occur in psychotic disorders, but also as a symptom of other conditions and even in healthy people. Several current theories on the origin of AVH converge, with neuroimaging studies suggesting that the language, auditory and memory/limbic networks are of particular relevance. However, reconciliation of these theories with experimental evidence is missing. We review 50 studies investigating functional (EEG and fMRI) and anatomic (diffusion tensor imaging) connectivity in these networks, and explore the evidence supporting abnormal connectivity in these networks associated with AVH. We distinguish between functional connectivity during an actual hallucination experience (symptom capture) and functional connectivity during either the resting state or a task comparing individuals who hallucinate with those who do not (symptom association studies). Symptom capture studies clearly reveal a pattern of increased coupling among the auditory, language and striatal regions. Anatomical and symptom association functional studies suggest that the interhemispheric connectivity between posterior auditory regions may depend on the phase of illness, with increases in non-psychotic individuals and first episode patients and decreases in chronic patients. Leading hypotheses involving concepts as unstable memories, source monitoring, top-down attention, and hybrid models of hallucinations are supported in part by the published connectivity data, although several caveats and inconsistencies remain. Specifically, possible changes in fronto-temporal connectivity are still under debate. Precise hypotheses concerning the directionality of connections deduced from current theoretical approaches should be tested using experimental approaches that allow for discrimination of competing hypotheses.

Item Type:

Journal Article (Further Contribution)

Division/Institute:

04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Translational Research Center
04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy
04 Faculty of Medicine > University Psychiatric Services

UniBE Contributor:

Hubl, Daniela

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1873-5118

Publisher:

Elsevier

Language:

English

Submitter:

Daniela Hubl

Date Deposited:

13 Feb 2017 15:05

Last Modified:

13 Feb 2017 15:05

Publisher DOI:

10.1016/j.pneurobio.2016.11.002

PubMed ID:

27890810

BORIS DOI:

10.7892/boris.91275

URI:

https://boris.unibe.ch/id/eprint/91275

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