Effect of rTMS on Parkinson's cognitive function: a systematic review and meta-analysis

Area of Science:

• Neuroscience
• Neurology
• Cognitive Science

Background:

• Parkinson's disease (PD) is associated with cognitive decline.
• Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive brain stimulation technique.
• The efficacy of rTMS for cognitive function in PD requires evaluation.

Purpose of the Study:

• To assess the effects of rTMS on cognitive function in Parkinson's disease patients.
• To determine optimal rTMS parameters for cognitive enhancement.
• To identify specific cognitive domains that benefit most from rTMS.

Main Methods:

• A meta-analysis of published studies on rTMS for PD cognitive function was conducted.
• Data were extracted on global cognitive function and specific cognitive domains.
• Standardized mean differences (SMDs) and 95% confidence intervals (CIs) were calculated.

Main Results:

• Fourteen studies with 173 participants were analyzed.
• A significant effect was found for global cognitive function (MMSE).
• Executive function showed a prominent positive effect, especially with high-frequency rTMS over the DLPFC.

Conclusions:

• High-frequency rTMS applied to the dorsolateral prefrontal cortex (DLPFC) may improve executive function in PD.
• Further large-scale, well-designed studies are needed to confirm these findings and assess long-term effects.