Examining frontotemporal connectivity and rTMS in healthy controls: implications for auditory hallucinations in schizophrenia.

P.M. Gromann, D.K. Tracy, V. Giampietro, M.J. Brammer, A.C. Krabbendam, S.S. Shergill

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Objective: Repetitive transcranial magnetic stimulation (rTMS) has been shown to have clinically beneficial effects in altering the perception of auditory hallucinations (AH) in patients with schizophrenia. However, the mode of action is not clear. Recent neuroimaging findings indicate that rTMS has the potential to induce not only local effects but also changes in remote, functionally connected brain regions. Frontotemporal dysconnectivity has been proposed as a mechanism leading to psychotic symptoms in schizophrenia. The current study examines functional connectivity between temporal and frontal brain regions after rTMS and the implications for AH in schizophrenia. Method: A connectivity analysis was conducted on the fMRI data of 11 healthy controls receiving rTMS, compared with 11 matched subjects receiving sham TMS, to the temporoparietal junction, before engaging in a task associated with robust frontotemporal activation. Results: Compared to the control group, the rTMS group showed an altered frontotemporal connectivity with stronger connectivity between the right temporoparietal cortex and the dorsolateral prefrontal cortex and the angular gyrus. Conclusion: This finding provides preliminary evidence for the hypothesis that normalizing the functional connectivity between the temporoparietal and frontal brain regions may underlie the therapeutic effect of rTMS on AH in schizophrenia. © 2012 American Psychological Association.
Original languageEnglish
Pages (from-to)127-132
JournalNeuropsychology
Volume26
Issue number1
DOIs
Publication statusPublished - 2012

Fingerprint

Dive into the research topics of 'Examining frontotemporal connectivity and rTMS in healthy controls: implications for auditory hallucinations in schizophrenia.'. Together they form a unique fingerprint.

Cite this