The spatiotemporal pattern of auditory cortical responses during verbal hallucinations

van de Ven, VG; Formisano, E; Röder, CH; Prvulovic, D; Bittner, RA; Dietz, MG; Hubl, D; Dierks, T; Federspiel, A; Esposito, F; Di Salle, F; Jansma, B; Goebel, R; Linden, D.E. (2005). The spatiotemporal pattern of auditory cortical responses during verbal hallucinations. NeuroImage, 27(3), pp. 644-55. San Diego, Calif.: Elsevier 10.1016/j.neuroimage.2005.04.041

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Functional magnetic resonance imaging (fMRI) studies can provide insight into the neural correlates of hallucinations. Commonly, such studies require self-reports about the timing of the hallucination events. While many studies have found activity in higher-order sensory cortical areas, only a few have demonstrated activity of the primary auditory cortex during auditory verbal hallucinations. In this case, using self-reports as a model of brain activity may not be sensitive enough to capture all neurophysiological signals related to hallucinations. We used spatial independent component analysis (sICA) to extract the activity patterns associated with auditory verbal hallucinations in six schizophrenia patients. SICA decomposes the functional data set into a set of spatial maps without the use of any input function. The resulting activity patterns from auditory and sensorimotor components were further analyzed in a single-subject fashion using a visualization tool that allows for easy inspection of the variability of regional brain responses. We found bilateral auditory cortex activity, including Heschl's gyrus, during hallucinations of one patient, and unilateral auditory cortex activity in two more patients. The associated time courses showed a large variability in the shape, amplitude, and time of onset relative to the self-reports. However, the average of the time courses during hallucinations showed a clear association with this clinical phenomenon. We suggest that detection of this activity may be facilitated by examining hallucination epochs of sufficient length, in combination with a data-driven approach.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > UPD Murtenstrasse 04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Psychiatric Neurophysiology [discontinued] 04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Management
UniBE Contributor:	Hubl, Daniela, Federspiel, Andrea, Esposito, Fabio
ISSN:	1053-8119
ISBN:	15978843
Publisher:	Elsevier
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:55
Last Modified:	05 Dec 2022 14:17
Publisher DOI:	10.1016/j.neuroimage.2005.04.041
PubMed ID:	15978843
Web of Science ID:	000231543600016
URI:	https://boris.unibe.ch/id/eprint/23316 (FactScience: 41278)