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Movement-responsive deep brain stimulation reinforces motor circuits in Parkinson's disease

Lawrence, D. J.; Suh, J.; Chang, V.; Herron, J. A.; Starr, P. A.; Little, S. J.

2026-08-25 neurology
10.64898/2026.08.20.26360021 medRxiv
Show abstract

Deep brain stimulation is an established treatment for Parkinson's disease but does not adapt to dynamic changes in brain state. Here, in four patients with sensing-enabled DBS systems, we evaluated a movement-responsive DBS (mDBS) paradigm that modulated subthalamic stimulation based on volitional motion decoded from cortical activity. During structured motor tasks, mDBS improved average forearm speed and mitigated the progressive bradykinetic slowing observed under constant-amplitude DBS (cDBS), accompanied by a cumulative increase in sensorimotor cortical beta activity and connectivity. In unconstrained, daily activities, mDBS lowered average bradykinesia severity and demonstrated progressive symptom reduction over hours of therapy, which gradually reversed upon switching to cDBS. These findings highlight the enhanced therapeutic benefit of mDBS and its potential to reinforce functional motor circuits in disorders of movement.

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