The Effect of rTMS on Gamma Activity in Schizophrenia
Author Information
Author(s): Barr Mera S., Farzan Faranak, Arenovich Tamara, Chen Robert, Fitzgerald Paul B., Daskalakis Zafiris J.
Primary Institution: Centre for Addiction and Mental Health, University of Toronto
Hypothesis
Excessive gamma oscillatory activity in patients with schizophrenia would be reduced with rTMS compared to sham stimulation.
Conclusion
rTMS reduced excessive gamma oscillatory activity in patients with schizophrenia while potentiating this activity in healthy subjects.
Supporting Evidence
- Patients with schizophrenia showed excessive gamma activity during working memory tasks.
- Active rTMS reduced gamma activity in patients but increased it in healthy subjects.
- The effects of rTMS were specific to the frontal brain region.
- Changes in gamma activity were not associated with improvements in working memory performance.
Takeaway
This study looked at how a treatment called rTMS affects brain waves in people with schizophrenia. It found that rTMS helped reduce too much brain wave activity in these patients.
Methodology
The study used a randomized, double-blind, placebo-controlled design with patients receiving either active or sham rTMS while performing a working memory task.
Potential Biases
Potential bias due to the small sample size and the influence of antipsychotic medication on results.
Limitations
The study had a small sample size and did not measure neurotransmitter activity pre or post rTMS.
Participant Demographics
24 patients with schizophrenia (14 males, 10 females) and 22 healthy subjects (11 males, 11 females).
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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