Compact Multi-Electrode Device for EEG Signal Quality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electroencephalography (EEG) devices have poor spatial resolution and low signal-to-noise ratios due to the number and placement of electrodes, limiting their applications to clinical settings and hindering the interpretation of neural activity recordings.
Innovation Solution
A compact multi-electrode device with closely placed active and reference electrodes, capable of recording and analyzing EEG data to generate a single channel of neural recordings, which can be normalized across time bins and frequencies to identify sleep stages and detect sleep disturbances, and can also be used to collect electromyography (EMG) data for communication assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dozens of electrodes are placed all around a person's head to improve signal-to-noise ratios, then the signal quality improves, but the device complexity and placement precision requirements increase
Solution Approach 1:
The patent combines multiple electrodes (active electrode, reference electrode, and ground electrode) into a single integrated device with a common substrate, reducing the number of separate components and simplifying placement while maintaining signal quality
2Measurement precision
If dozens of electrodes are precisely placed on scalp locations to improve signal-to-noise ratios, then the measurement precision improves, but the ease of operation deteriorates
Solution Approach 1:
The patent integrates multiple electrodes onto a single device with fixed relative positions, eliminating the need for precise individual electrode placement while maintaining measurement precision through the integrated design
Solution Approach 2:
The single device serves multiple functions by incorporating active, reference, and ground electrodes in a unified structure, making it versatile for different recording configurations without requiring multiple separate electrodes
3Reliability
If reference electrode is placed far from active electrode at neutral location, then signal distortion is reduced, but the device footprint and separation distances increase
Solution Approach 1:
The patent places all electrodes (active, reference, and ground) in close proximity on a common substrate, merging their functions spatially while using signal processing to maintain quality, thereby reducing the overall device footprint
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 device enables efficient and portable recording of neural activity, allowing for the detection of sleep disturbances and communication through cursor control, improving the interpretation of EEG data and expanding its applications beyond clinical settings.
Implementation Method 1
a device with electrodes configured to record electrical activity
Data Source
AI summary
The present disclosure provides a device with electrodes configured to record electrical activity that are confined to a restricted area, using recorded biological electrical signals to control cursor position in a speech-assistance interface, and using recorded biological signals to detect arousals during sleep.