Segmented Electrode Array for Selective Neural Blockade
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Solution Overview
Problem
Current management options for aberrant neural recovery following high-grade peripheral motor nerve injuries, such as facial palsy, result in involuntary muscle activation and loss of motor control, leading to functional and psychosocial impairments, as existing treatments like physiotherapy and botulinum toxin injections do not restore normal physiologic function.
Innovation Solution
The use of electrical neural blockade and functional stimulation methods, involving electrode arrays to deliver high-frequency alternating current for localized neural blockade and variable stimulation signals to dysfunctional or transferred nerves, allowing for selective inhibition of undesirable neural activity and proportional activation of target muscles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high-frequency alternating current is delivered through electrode arrays to block neural signals, then involuntary muscle activation is reduced, but device complexity increases
Solution Approach 1:
The nerve is divided into multiple segments along its length, with electrode arrays placed at specific locations to selectively block abnormal signals while preserving normal function. The electrode array itself is segmented into multiple contact points that can be independently controlled to achieve precise spatial selectivity in signal blockade.
Solution Approach 2:
The neural blockade is applied locally at specific sites along the nerve rather than globally. By positioning electrode arrays at strategic locations and using localized high-frequency alternating current, the treatment targets only the abnormal neural signals while preserving normal muscle activation patterns distal to the blockade site.
2Ease of operation
If electrical stimulation is applied to dysfunctional nerves to restore muscle control, then motor function improves, but abnormal muscle activation may occur
Solution Approach 1:
The system incorporates feedback mechanisms where muscle activity is monitored and used to adjust the stimulation parameters in real-time. This closed-loop control allows the system to distinguish between desired and undesired muscle activations, adjusting stimulation delivery to maximize functional benefit while minimizing abnormal activation patterns.
Solution Approach 2:
The electrical stimulation parameters are made dynamic and adjustable rather than fixed. Stimulation frequency, amplitude, and pulse width can be modulated in response to changing physiological conditions, allowing optimization of motor control while adapting to prevent or correct abnormal muscle activation patterns as they develop.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach provides selective, localized, and reversible neural blockade, preventing propagation of aberrant neural signals while maintaining muscle excitability, thereby improving muscle control and reducing involuntary movements, thus enhancing quality of life and functional capabilities.
Implementation Method 1
delivering a localized electrical neural blockade signal through the electrode array to inhibit propagation of neural depolarization at that point
Implementation Method 2
delivering a variable stimulus signal to the dysfunctional or transferred neuromusculature in a functional manner distal to the point of neural blockade
Data Source
AI summary
Methods and devices are provided for electrical neural blockade and stimulation of dysfunctional or transferred nerves. For example, a method is provided including identifying a dysfunctional or transferred nerve, attaching an electrode array to the dysfunctional or transferred nerve proximal to the target musculature, delivering an electrical neural blockade signal, and stimulating the dysfunctional or transferred nerve distal to the point of neural blockade. A system is also provided with an electrode array configured to attach proximally to a dysfunctional or transferred nerve and deliver an electrical neural blockade signal with a neuromuscular stimulating electrode array placed distal to the point of neural blockade, and a processor in communication with the electrode arrays and configured to provide stimulation instructions based on the detected activity of the other neuromusculature. A method is further provided for identifying and treating dysfunction arising from aberrant neural regeneration for which contralateral paired neuromusculature exists.