Clinical Report: Impact and Mechanisms of High-Frequency rTMS on the Angular Gyrus
Overview
This study investigates the effects of high-frequency repetitive transcranial magnetic stimulation (rTMS) on consciousness in patients with prolonged disorders of consciousness (pDoC). Results indicate that active rTMS significantly improves behavioral signs of consciousness compared to sham stimulation, with specific neural mechanisms identified.
Background
Prolonged disorders of consciousness (pDoC) present significant challenges in clinical settings, particularly following severe brain injuries. Current treatment options are limited, and understanding effective interventions is crucial for improving patient outcomes. The study of neuromodulation techniques, such as rTMS, offers potential pathways for enhancing consciousness-related behaviors in affected patients.
Data Highlights
Parameter
Result
Behavioral improvement during active rTMS
p < 0.05
Random forest AUC for network recovery characterization
0.861
Support vector machine AUC for predicting improvement
0.972
Key Findings
Active rTMS improved consciousness-related behaviors more frequently than sham stimulation.
Behavioral improvements were noted predominantly in visual, motor, and auditory domains.
Post-rTMS recovery within the default mode network (DMN) and subcortical network (SCN) characterized responders.
Stronger baseline within-DMN functional connectivity predicted greater likelihood of improvement.
The study utilized a randomized, double-blind, sham-controlled crossover design.
Clinical Implications
The findings suggest that high-frequency rTMS may serve as a viable intervention for enhancing consciousness in a subset of pDoC patients. Clinicians should consider baseline functional connectivity when evaluating potential treatment responses.
Conclusion
High-frequency rTMS targeting the left angular gyrus shows promise in improving consciousness-related behaviors in pDoC patients, with specific neural mechanisms identified as predictors of response.
