Should We Expand the Toolbox of Psychiatric Treatment Methods to Include Repetitive Transcranial Magnetic Stimulation (rTMS)? A Meta-Analysis of the Efficacy of rTMS in Psychiatric Disorders
ABSTRACT Repetitive transcranial magnetic stimulation (rTMS) is a safe treatment method with few side effects. However, efficacy for various psychiatric disorders is currently not clear.
A literature search was performed from 1966 through October 2008 using PubMed, Ovid Medline, Embase Psychiatry, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, Database of Abstracts of Reviews of Effects, and PsycINFO. The following search terms were used: transcranial magnetic stimulation, TMS, repetitive TMS, psychiatry, mental disorder, psychiatric disorder, anxiety disorder, attention-deficit hyperactivity disorder, bipolar disorder, catatonia, mania, depression, obsessive-compulsive disorder, psychosis, posttraumatic stress disorder, schizophrenia, Tourette's syndrome, bulimia nervosa, and addiction.
Data were obtained from randomized, sham-controlled studies of rTMS treatment for depression (34 studies), auditory verbal hallucinations (AVH, 7 studies), negative symptoms in schizophrenia (7 studies), and obsessive-compulsive disorder (OCD, 3 studies). Studies of rTMS versus electroconvulsive treatment (ECT, 6 studies) for depression were meta-analyzed.
Standardized mean effect sizes of rTMS versus sham were computed based on pretreatment-posttreatment comparisons.
The mean weighted effect size of rTMS versus sham for depression was 0.55 (P < .001). Monotherapy with rTMS was more effective than rTMS as adjunctive to antidepressant medication. ECT was superior to rTMS in the treatment of depression (mean weighted effect size -0.47, P = .004). In the treatment of AVH, rTMS was superior to sham treatment, with a mean weighted effect size of 0.54 (P < .001). The mean weighted effect size for rTMS versus sham in the treatment of negative symptoms in schizophrenia was 0.39 (P = .11) and for OCD, 0.15 (P = .52). Side effects were mild, yet more prevalent with high-frequency rTMS at frontal locations.
It is time to provide rTMS as a clinical treatment method for depression, for auditory verbal hallucinations, and possibly for negative symptoms. We do not recommend rTMS for the treatment of OCD.
- SourceAvailable from: Jozarni J Dlabac-de Lange
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- "Three meta-analyses have been performed on the rTMS treatment of negative symptoms of schizophrenia (Slotema et al., 2010; Dlabac-de Lange et al., 2010; Shi et al., 2013). One included 7 studies and found a trend for improvement of negative symptoms after rTMS (Slotema et al., 2010). The other two included more studies (9 and 13) and both found a statistically significant positive treatment effect (Dlabac-de Lange et al., 2010; Shi et al., 2013). "
ABSTRACT: Prefrontal cortical dysfunction is frequently reported in schizophrenia and is thought to underlie negative symptoms of schizophrenia. Repetitive Transcranial Magnetic Stimulation (rTMS) can modulate neuronal activity and has been shown to improve negative symptoms in patients with schizophrenia, but the underlying neural mechanism is unknown. To examine whether 3weeks of 10Hz rTMS treatment of the bilateral dorsolateral prefrontal cortex (DLPFC) would improve frontal brain activation in patients with negative symptoms of schizophrenia, as measured by functional magnetic resonance imaging (fMRI) during the Tower of London (ToL) task. 24 patients with the diagnosis of schizophrenia with moderate to severe negative symptoms (Positive and Negative Syndrome Scale (PANSS) negative subscale≥15) participated. Patients were randomized to a 3-week (15day) course of active or sham rTMS. All patients performed the ToL task during fMRI scanning both pre-treatment and post-treatment. Differences in brain activation between the two groups were compared non-parametrically. After rTMS treatment, brain activity in the active group increased in the right DLPFC and the right medial frontal gyrus as compared to the sham group. In addition, the groups significantly differed with regard to activation change in the left posterior cingulate, with decreased activation in the active and increased activation in the sham group. Treatment with rTMS over the DLPFC may have the potential for increasing task-related activation in frontal areas in patients with schizophrenia. Effects of different rTMS parameters and fMRI tasks targeting relevant brain circuitry deserve further investigation. Nederlands Trial Register, registration number: NTR1261. Copyright © 2015 Elsevier B.V. All rights reserved.Schizophrenia Research 07/2015; DOI:10.1016/j.schres.2015.06.018 · 4.43 Impact Factor
Brain Stimulation 03/2015; 8(2):404. DOI:10.1016/j.brs.2015.01.287 · 5.43 Impact Factor
- "Repetitive Transcranial Magnetic Stimulation (rTMS) is safe and effective for treatment of Major Depressive Disorder (MDD) in patients who have failed to benefit from antidepressant medication [1e7]. rTMS is administered using a high-field (w1.5 T) electromagnet , with the best established protocols targeting the left dorsolateral prefrontal cortex (DLPFC) at frequencies of 10e20 Hz  , or the right DLPFC at a frequency of 1 Hz  . The optimal intensity, brain area, and frequency of stimulation have not been established through controlled studies . "
Australian and New Zealand Journal of Psychiatry 02/2015; 49(2):182-183. DOI:10.1177/0004867414564697 · 3.77 Impact Factor
- "Response rates are low for all of these interventions in this patient population. Electroconvulsive therapy (ECT) is more effective than repetitive Transcranial Magnetic Stimulation (rTMS) (Slotema et al., 2010) (particularly for those with severe depression), but has the disadvantages of the risk of cognitive side effects, and being unacceptable to some patients. rTMS has been extensively evaluated in TRD. "