Neuromuscular Stimulation with Real-Time EMG Feedback
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Solution Overview
Problem
Current neuromuscular stimulation technologies lack real-time proportional control over voluntary muscle contractions, which limits their effectiveness in muscle rehabilitation and growth, particularly for individuals with paralysis or muscle atrophy, as they rely on pre-set stimulation parameters and do not adapt to the user's effort in real-time.
Innovation Solution
A system that continuously detects voluntary EMG signals from the muscle being stimulated and modulates the amplitude of neuromuscular stimulation pulses in real-time based on the detected effort, using a controller to adjust the pulse amplitude proportionally to the user's muscle contraction, allowing for smooth and controlled muscle contractions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pre-set stimulation parameters are used, then device complexity is reduced, but adaptability to user effort in real-time deteriorates
Solution Approach 1:
The system continuously detects voluntary EMG signals from the muscle being stimulated and uses this feedback to dynamically adjust the amplitude of stimulation pulses in real-time, creating a closed-loop control system that adapts to the user's effort level
Solution Approach 2:
The stimulation parameters transition from fixed pre-set values to dynamically adjustable values that change continuously based on the detected voluntary EMG signal amplitude, allowing the system to adapt its behavior in real-time according to user effort
2Ease of operation
If fixed amplitude stimulation pulses are applied, then ease of operation is improved, but control precision over muscle contraction force deteriorates
Solution Approach 1:
The system uses real-time detection of voluntary EMG signals to precisely control the amplitude of stimulation pulses, creating a proportional relationship between user effort and stimulation intensity that enables fine-grained control over muscle contraction force
Solution Approach 2:
The amplitude parameter of stimulation pulses is changed dynamically based on the detected voluntary EMG signal, transitioning from fixed values to continuously variable values that precisely match the user's intended effort level
3Device complexity
If stimulation parameters are pre-set, then device complexity is reduced, but effectiveness in muscle rehabilitation deteriorates
Solution Approach 1:
The system continuously monitors voluntary EMG signals and adjusts stimulation parameters in real-time to match the user's effort, creating an adaptive rehabilitation protocol that responds to the patient's actual muscle activation levels and progresses naturally with improvement
Solution Approach 2:
The rehabilitation protocol transitions from static pre-set parameters to dynamic parameters that automatically adapt to the patient's changing muscle strength and activation patterns, ensuring optimal stimulation intensity throughout the rehabilitation process
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
Enables precise and natural-feeling muscle control, enhancing muscle rehabilitation and growth by providing proportional stimulation that mirrors the user's effort, improving recovery and muscle strength through real-time adaptation of stimulation intensity.
Implementation Method 1
Electromyography (EMG) is an electro-diagnostic medical technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG is performed using an electromyograph to produce a record called an electromyogram.
Implementation Method 2
Electrical pulses have been used for many years for muscle stimulation. Application of trains of pulses of adequate amplitude, pulse-width and pulse-repetition-frequency at appropriate locations above the region of certain key muscles enabled paraplegic patients to stand up and to take steps
Data Source
AI summary
The present invention relates to an apparatus and a method for neuromuscular stimulation which is useful for stimulation of weak muscles in general, in sports clinical mode for muscle growth and endurance and in clinical mode for muscular rehabilitation. EMG signals are received from the subject adjacent a muscle whose contraction is to be stimulated. A succession of stimulation (STIM) pulses are supplied to the muscle to be stimulated. The EMG-receiving module is operated during quiescent periods between successive pulses, and the amplitude of stimulation pulses supplied to the subject in the succession is modulated proportionately depending on the a detected voluntary component of the received EMG signals. Modulation is in real time during supply of stimulation pulses whereby the subject is given a sensation of natural muscle control and/or the possibility for greater precision of neuromuscular control.