Neurostimulation System Using Composite Bursting Waveforms
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Solution Overview
Problem
Current deep brain stimulation methods for treating movement disorders, such as Parkinson's disease, rely on regular isochronous electrical stimulation, which may not effectively mimic natural brain activity or promote motor recovery after neurological insults like stroke.
Innovation Solution
A neurostimulation system that delivers composite patterns of stimulation, combining a primary isochronous waveform with a secondary waveform that is periodically superimposed, creating periodic bursting stimulation, which is derived from input waveforms recorded from healthy or partially functional nervous system sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If regular isochronous stimulation is used to treat movement disorders, then the treatment is simple to implement and widely approved, but it fails to effectively mimic natural brain activity or promote motor recovery after neurological insults
Solution Approach 1:
The patent applies periodic action by using periodic bursting stimulation patterns where bursts of high-frequency stimulation are delivered at specific intervals. This mimics the natural periodic activity patterns of healthy brain circuits, particularly the dentatothalamocortical pathway, thereby resolving the contradiction between simplicity and adaptability by introducing biologically relevant temporal structure without requiring complex hardware modifications
Solution Approach 2:
The patent employs parameter changes by varying multiple stimulation parameters including frequency, amplitude, and duty cycle to create composite waveforms that reflect natural brain activity patterns. The system dynamically adjusts these parameters to match the physiological characteristics of healthy neural circuits, enabling adaptability while managing complexity through systematic parameter optimization
2Reliability
If composite patterns of stimulation are used to enhance motor recovery, then the effectiveness in mimicking natural brain activity improves, but the complexity of the stimulation system increases
Solution Approach 1:
The patent applies merging by combining multiple stimulation waveforms into composite patterns that integrate both high-frequency bursts and lower-frequency components. This consolidation of multiple waveform elements into a unified stimulation protocol enhances motor recovery effectiveness while managing system complexity through integrated waveform generation rather than separate independent systems
Solution Approach 2:
The patent uses preliminary action by pre-programming and storing optimized composite waveforms in memory before delivery to the target neural circuit. This allows the complex waveforms to be prepared and validated in advance, ensuring reliability of motor recovery enhancement while reducing real-time computational complexity during actual stimulation delivery
Data Source
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AI summary
A neurostimulation system comprises a memory, a playback system, a stimulation electrode, and a controller. The memory can store data for first and second input waveforms. The playback system can provide first and second output waveforms, based on the first and second input waveforms in the memory, respectively, to form composite patterns of stimulation or waveforms. The first output waveform can be different than the second output waveform. The second output waveform can be periodically superimposed on the first output waveform. The controller can be in communication with the stimulation electrode. The controller can be configured to control application of the composite pattern of stimulation or waveform to a target site in a body of a subject suffering from a medical condition.