Temple Electrode Assembly for Bruxism EMG Detection
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Solution Overview
Problem
Existing monitoring devices for bruxism, particularly night-time bruxism, face challenges in effectively detecting muscle activity from the temporal muscle due to weaker EMG signals and discomfort caused by electrodes placed on the cheek and jaw, which are more accessible for the masseter muscle.
Innovation Solution
A small electrode assembly with three electrodes in a fixed spatial relationship, placed near the temple to access the front edge of the temporal muscle, processes EMG signals to detect bruxism activity and provides a feedback signal to reduce muscle activity, distinguishing between bruxism and normal muscle activity using frequency analysis and adjustable stimulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electrodes are placed on the masseter muscle at the cheek and jaw for accessible signal acquisition, then EMG signal strength is improved, but patient comfort deteriorates during sleep
Solution Approach 1:
The patent introduces an intermediary location (temple area) between the masseter muscle location and the ideal comfortable location. By placing electrodes at the temple near the front edge of the temporal muscle, the system captures EMG signals through an intermediate anatomical position that balances signal quality with patient comfort during sleep
2Object-affected harmful factors
If electrodes are placed on the temporal muscle above the hair line for comfortable patient experience, then patient comfort is improved, but EMG signal strength deteriorates due to weaker and more difficult to process signals
Solution Approach 1:
The patent applies local quality by selecting a specific localized region (temple area near the front edge of the temporal muscle) that has different properties than other temporal muscle locations. This specific location provides a local optimum where both signal quality and patient comfort are acceptable, rather than using a uniform approach across all temporal muscle areas
3Object-affected harmful factors
If a small electrode assembly is used near the temple for patient comfort, then patient comfort is improved, but detection accuracy may deteriorate due to smaller contact areas
Solution Approach 1:
The patent changes the spatial parameters of the electrode assembly by defining specific distance relationships between electrodes (at least 2 mm spacing, maximum 60 mm diameter). These parameter changes optimize the balance between small contact area for comfort and sufficient spacing for accurate EMG signal detection from the temporal muscle
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
The solution provides a comfortable and effective monitoring and feedback system for bruxism, specifically targeting the temporal muscle, reducing discomfort and improving detection accuracy while minimizing disturbance during sleep.
Implementation Method 1
EMG (electromyography) signals are picked up from an electrode on the skin and are analysed electronically
Implementation Method 2
The feedback signal is a stimulation signal sent back to the skin via the same electrodes. This signal is intended to be sufficient to have an effect on bruxism
Data Source
AI summary
The invention relates to an apparatus for monitoring muscle activity related to bruxism, said apparatus comprising:—an electrode assembly for providing signals indicative of said muscle activity, means for processing said signals in order to detect said bruxism, and means for providing a feedback signal in response to detecting said bruxism; wherein said electrode assembly comprises three electrodes in a fixed spatial relationship one to another, each electrode having a contact area for electrical connection with the skin which is spaced from the contact area of each other electrode in the electrode assembly by at least 2 mm, the maximum distance from an edge of one electrode contact area to the furthest edge of the furthest away of the other electrode contact areas being not greater than 60 mm.