Psychological Medicine



High-frequency repetitive transcranial magnetic stimulation in schizophrenia: a combined treatment and neuroimaging study


G. HAJAK a1c1, J. MARIENHAGEN a1, B. LANGGUTH a1, S. WERNER a1, H. BINDER a1 and P. EICHHAMMER a1
a1 Department of Psychiatry and Psychotherapy, and Department of Nuclear Medicine, University of Regensburg, Regensburg, Germany

Article author query
hajak g   [PubMed][Google Scholar] 
marienhagen j   [PubMed][Google Scholar] 
langguth b   [PubMed][Google Scholar] 
werner s   [PubMed][Google Scholar] 
binder h   [PubMed][Google Scholar] 
eichhammer p   [PubMed][Google Scholar] 

Abstract

Background. Repetitive transcranial magnetic stimulation (rTMS) of frontal brain regions is under study as a non-invasive method in the treatment of affective disorders. Recent publications provide increasing evidence that rTMS may be useful in treating schizophrenia. Results are most intriguing, demonstrating a reduction of negative symptoms following high-frequency rTMS. In this context, disentangling of negative and depressive symptoms is of the utmost importance when understanding specific rTMS effects on schizophrenic symptoms.

Method. Using a sham-controlled parallel design, 20 patients with schizophrenia were included in the study. Patients were treated with high-frequency 10 Hz rTMS over 10 days. Besides clinical ratings, ECD-SPECT (technetium-99 bicisate single photon emission computed tomography) imaging was performed before and after termination of rTMS treatment.

Results. High-frequency rTMS leads to a significant reduction of negative symptoms combined with a trend for non-significant improvement of depressive symptoms in the active stimulated group as compared with the sham stimulated group. Additionally, a trend for worsening of positive symptoms was observed in the actively treated schizophrenic patients. In both groups no changes in regional cerebral blood flow could be detected by ECD-SPECT.

Conclusions. Beneficial effects of high-frequency rTMS on negative and depressive symptoms were found, together with a trend for worsening positive symptoms in schizophrenic patients.


Correspondence:
c1 Professor Göran Hajak, Department of Psychiatry and Psychotherapy, University of Regensburg, Universitaetsstrasse 84, 93042 Regensburg, Germany. (Email: goeran.hajak@medbo.de)


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