Transcranial magnetic stimulation (TMS) for schizophrenia

Area of Science:

• Neuroscience
• Psychiatry
• Clinical Trials

Background:

• Schizophrenia symptoms often persist despite antipsychotic medication.
• Transcranial magnetic stimulation (TMS) is being explored as a novel treatment for schizophrenia, particularly for persistent auditory hallucinations.

Purpose of the Study:

• To evaluate the efficacy of TMS in reducing psychotic symptoms associated with schizophrenia.
• To compare TMS (alone or as an adjunct) against sham TMS or standard management.

Main Methods:

• Systematic review of randomized controlled trials (RCTs) from the Cochrane Schizophrenia Group Trials Register.
• Inclusion criteria: RCTs with at least five participants comparing TMS to sham TMS or other treatments.
• Data analysis included relative risks and mean differences, with evidence quality assessed using GRADE.

Main Results:

• Temporoparietal TMS showed some benefit for global state and positive symptoms versus sham TMS, but with very low-quality evidence and increased headaches.
• No significant differences were found for temporoparietal TMS as an adjunct to antipsychotics.
• Prefrontal TMS yielded equivocal results for global and cognitive states, with increased headaches; prefrontal theta burst stimulation showed some benefit for mental state.

Conclusions:

• Insufficient evidence exists to support or refute TMS for schizophrenia symptoms due to very low-quality evidence and methodological limitations.
• Standardized protocols and outcome measures are needed for future TMS trials in schizophrenia.
• Further high-quality research is required to determine the true efficacy and safety of TMS for schizophrenia.