Closed-Loop Deep Brain Stimulation for Beta Oscillation Control
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Solution Overview
Problem
In patients with Parkinson's disease, excessive synchronous neuronal activity in brain regions like the thalamus and basal ganglia disrupts movement execution, and existing treatments such as dopaminergic medications and deep brain stimulation have limitations in targeting and managing beta oscillatory activity effectively.
Innovation Solution
A method involving the measurement and analysis of neuronal firing and local field potentials using implanted electrodes to identify areas of beta oscillatory activity, allowing for targeted stimulation to disrupt synchronized beta oscillations in the subthalamic nucleus, thereby alleviating symptoms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deep brain stimulation is used to treat Parkinson's disease, then motor symptoms are improved, but energy consumption increases and therapy duration is limited
Solution Approach 1:
The patent implements a closed-loop system that continuously monitors beta oscillatory activity in the subthalamic nucleus and adjusts stimulation parameters in real-time based on the detected neural activity patterns, thereby optimizing therapeutic effect while minimizing energy consumption
Solution Approach 2:
The system delivers stimulation in periodic pulses synchronized with the detected beta oscillation cycles, applying stimulation only during specific phases of the oscillatory activity rather than continuous stimulation, which reduces overall energy consumption while maintaining therapeutic efficacy
2Reliability
If broad area stimulation is applied to the subthalamic nucleus, then beta oscillatory activity is disrupted, but side effects increase
Solution Approach 1:
The patent employs multi-contact electrodes that enable selective stimulation of specific sub-regions within the subthalamic nucleus, allowing the therapy to target the precise source of pathological beta oscillations while sparing adjacent neural structures, thereby reducing side effects
Solution Approach 2:
The stimulation electrode is divided into multiple independent contacts that can be activated selectively, allowing the system to segment the stimulation field and apply it only to the specific area exhibiting pathological beta oscillatory activity rather than the entire subthalamic nucleus
3Reliability
If continuous stimulation is applied, then symptom control is maintained, but battery life is reduced
Solution Approach 1:
The system transitions from continuous stimulation to periodic, event-driven stimulation that activates only when pathological beta oscillations are detected, maintaining symptom control during pathological states while conserving battery power during normal states
Solution Approach 2:
The closed-loop monitoring system continuously assesses neural activity and modulates stimulation delivery accordingly, reducing or suspending stimulation during periods of normal beta activity to extend battery life while ensuring rapid resumption of therapy when pathological oscillations reappear
Data Source
AI summary
The present invention relates to a method of identifying a region of the brain by measuring neuronal firing and/or local field potentials by recording discharges from at least one implanted electrode and analyzing the recording of the discharges within the beta frequency band range to determine an area of beta oscillatory activity. Once the region of the brain is identified, this region may be stimulated to disrupt the beta oscillatory activity thereby treating a movement disorder.