Lumbricalis Muscle Stimulation for Upper Extremity Mobility
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Solution Overview
Problem
Current rehabilitation methods for upper extremity mobility and control in stroke and spinal cord injury patients, particularly those with severe paralysis, are limited in effectiveness, as they often fail to improve mobility and strength beyond mild paresis.
Innovation Solution
The use of functional electrical stimulation (FES) therapy that specifically targets the lumbricalis muscle groups, combined with conventional muscle stimulation protocols, to enhance neural relearning and improve grasping and hand movement functions, including palmar grasp, lateral pinch, and pinch grasp, through synchronized electrical stimulation and voluntary exercise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional FES therapy is applied to patients with severe paralysis, then some improvement in upper extremity function is achieved, but the effectiveness is limited and cannot significantly improve mobility beyond mild paresis
Solution Approach 1:
The patent changes the stimulation parameters by specifically timing the lumbricalis muscle stimulation to occur during the relaxation phase of finger extensor stimulation. This temporal parameter change allows the intrinsic hand muscles to actively contribute to finger flexion and hand closing, transforming the therapy's effectiveness for severe paresis patients who previously showed limited improvement with conventional FES protocols.
2Reliability
If FES therapy stimulates multiple muscle groups including lumbricalis muscles, then hand function and grasping ability are significantly improved, but the stimulation sequence and coordination become more complex
Solution Approach 1:
The patent implements periodic action by cycling through a specific stimulation sequence: activate finger extensors, then activate lumbricalis muscles during the relaxation phase, and repeat this cycle multiple times. This periodic stimulation pattern creates rhythmic hand opening and closing movements that improve grasping function while maintaining a manageable level of system coordination complexity through repetition of a standardized sequence.
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
Significantly improves upper extremity function and mobility in both mild and severe paresis cases, allowing for more natural hand posture and improved ability to perform daily activities by retraining neural pathways and muscle coordination.
Implementation Method 1
The method comprises providing electrical stimulation to the lumbricalis muscle groups and finger extensor muscles of the patient in a specific sequence and pattern
Data Source
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AI summary
A functional electrical stimulation method for rehabilitating, treating, retraining, and/or otherwise improving upper extremity mobility and control in persons having impaired or disabled upper extremities due to stroke or spinal cord injury, comprising stimulation of the lumbricalis muscles.