Structural correlates underlying accelerated magnetic stimulation in Parkinson's disease.

Area of Science:

• Neurology
• Neuroscience
• Medical Technology

Background:

• Parkinson's disease (PD) is a neurodegenerative disorder impacting motor function.
• Repetitive transcranial magnetic stimulation (rTMS) offers a noninvasive neuromodulation approach for PD treatment.
• Accelerated stimulation protocols require further investigation for clinical efficacy.

Purpose of the Study:

• To evaluate the clinical effectiveness of accelerated continuous theta-burst stimulation (cTBS) in Parkinson's disease patients.
• To explore the neural mechanisms underlying the therapeutic effects of cTBS in PD.
• To assess the duration of treatment effects and associated neuroimaging changes.

Main Methods:

• A double-blind, randomized controlled trial involving 42 PD patients.
• Patients received either real or sham cTBS targeting the left supplementary motor area (SMA) for 14 consecutive days.
• Clinical assessments using the Unified Parkinson's Disease Rating Scale (UPDRS) and neuroimaging (MRI) were conducted.

Main Results:

• Real cTBS significantly improved UPDRS Part III scores compared to sham (p < .0001).
• Improvements were observed within 1 week and persisted for 8 weeks post-treatment.
• Increased left globus pallidus (GP) volume correlated with symptom improvement and SMA-GP tract integrity.

Conclusions:

• Accelerated cTBS is an effective treatment for alleviating motor symptoms in Parkinson's disease.
• The treatment demonstrates rapid onset and sustained clinical benefits.
• Modulation of the SMA-GP pathway and GP volume changes may underlie the therapeutic effects.