Electrode Headset Grid for Non-Invasive Brain Stimulation
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Solution Overview
Problem
Current non-invasive brain stimulation and monitoring techniques face limitations in simultaneous use of electrodes for both electrical stimulation and EEG recording, due to the need for conductive gels, limited spatial resolution, and inflexibility in electrode configuration and function, which complicates procedures and reduces effectiveness.
Innovation Solution
An electrode headset grid with electrically isolated conductive regions that can accommodate multiple electrodes, allowing each electrode to function as both a stimulation and recording electrode, enabling flexible configuration and operation, including the use of a system to define stimulation and recording parameters, and potentially eliminating the need for conductive gels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional EEG wet electrodes with conductive gel are used for both stimulation and recording, then electrical connection is established, but electrode bridging occurs and spatial resolution is reduced
Solution Approach 1:
The conductive gel is segmented into isolated pools beneath each electrode contact point using an insulating substrate with discrete conductive regions. This prevents lateral spread of conductive material that would cause electrode bridging, while maintaining reliable electrical connection at each electrode site. The segmentation allows multiple electrodes to be positioned closely without signal contamination between adjacent channels.
Solution Approach 2:
An insulating substrate with discrete conductive regions serves as an intermediary between the conductive gel and the electrodes. This intermediary structure confines the conductive gel to specific locations, enabling reliable electrical connection while preventing the gel from creating conductive paths between adjacent electrodes, thus preserving spatial resolution.
2Reliability
If multiple electrodes are used for simultaneous stimulation and recording, then brain monitoring effectiveness increases, but procedure complexity increases due to separate electrode requirements
Solution Approach 1:
The electrode headset enables each electrode to serve dual functions as both stimulation and recording electrode through the insulating substrate design. This multi-functionality eliminates the need for separate stimulation and recording electrode sets, reducing procedural complexity while maintaining effective brain monitoring through multiple electrodes simultaneously.
Solution Approach 2:
The patent merges the previously separate stimulation and recording electrode systems into a single integrated electrode headset. By combining both functions into one device with isolated conductive regions, the system reduces the number of components and steps required, simplifying the overall procedure while maintaining monitoring effectiveness.
3Reliability
If conductive gel is applied to improve electrode contact, then electrical conductance increases, but skin irritation and preparation time increase
Solution Approach 1:
The patent extracts and eliminates the need for traditional conductive gel application by using pre-configured conductive regions integrated into the headset. This removes the source of skin irritation and eliminates the time-consuming gel application and skin preparation steps, while maintaining reliable electrical conductance through the designed conductive pathways.
Solution Approach 2:
The electrode headset is designed to be self-sufficient with integrated conductive regions that provide necessary electrical conductance without requiring external conductive gel. The device serves its own electrical connection needs through built-in conductive elements, eliminating the need for additional materials that cause skin irritation.
4Adaptability or versatility
If flexible electrode configuration is implemented, then adaptability to different brain regions increases, but electrode isolation and signal quality become difficult to maintain
Solution Approach 1:
The electrode headset provides dynamic configurability where electrodes can be positioned at various locations on the head while maintaining proper isolation. The insulating substrate design allows flexible placement and configuration adaptation to different brain regions of interest, while the physical isolation structures ensure signal quality is maintained regardless of electrode position or configuration changes.
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 solution allows for high spatial resolution EEG recordings and flexible electrical stimulation, increasing the number of electrodes that can be used concurrently, reducing noise, and minimizing skin irritation, while maintaining accurate and efficient brain stimulation and monitoring.
Implementation Method 1
an electrode headset grid comprising a plurality of conductive regions, electrically isolated from each other, wherein said conductive regions are configured to contact at least one electrode
Data Source
AI summary
The present invention provides an electrode headset grid adapted to fit on a head of a human subject, the grid comprising a plurality of conductive regions, electrically isolated from each other, wherein the conductive regions are configured to contact at least one electrode, and wherein the configuration of the conductive regions is configured to define an operating electrode unit. There is further provided an integrated system for brain electric stimulation and EEG monitoring, the system comprising the electrode headset grid and a plurality of electrodes. The invention further provides use of the electrode headset grid in an integrated non-invasive brain electrical stimulation and monitoring procedure.