Adjustable EEG Cap with Linear Actuators for Precision Brain Monitoring
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Solution Overview
Problem
Current treatments for brain disorders such as depression and anxiety, including pharmacological interventions and conventional neurofeedback, are inadequate due to side effects, inefficacy, and lack of precision, while precision psychiatry technologies are costly and inaccessible.
Innovation Solution
A wearable high-density EEG system with self-adjusting capabilities, using a cap with linear actuators to ensure optimal electrode contact and a processing device for real-time brain activity feedback, providing non-invasive and cost-effective neurofeedback for precise assessment and treatment of brain disorders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional EEG systems are used, then the system is simple and accessible, but the measurement precision and assessment accuracy are insufficient
Solution Approach 1:
The EEG cap is divided into multiple adjustable segments, each equipped with independent linear actuators that can be controlled separately to achieve precise electrode positioning across different regions of the scalp, thereby improving measurement precision while maintaining manageable system complexity through modular design
Solution Approach 2:
The EEG cap transitions from a static structure to a dynamic, actively adjustable system where linear actuators continuously modify electrode positions and cap fit in real-time, enabling the system to adapt to individual scalp geometries and optimize contact quality for enhanced measurement precision
2Adaptability or versatility
If fixed-size EEG caps are used, then the device complexity is low, but the adaptability to different head sizes and shapes is poor
Solution Approach 1:
The cap incorporates linear actuators that enable dynamic resizing and reshaping of the cap structure to match different head geometries, transforming a static one-size-fits-all design into an adaptive system that can be continuously adjusted during use to optimize fit across diverse populations
Solution Approach 2:
The system includes automated control mechanisms that enable the cap to self-adjust its size and shape based on detected scalp contours and electrode contact quality, reducing the need for manual intervention and simplifying the user experience while maintaining high adaptability
3Measurement precision
If manual electrode positioning is used, then the device complexity is low, but the measurement precision and contact quality are inconsistent
Solution Approach 1:
Each electrode is mounted on an independently controllable linear actuator that can dynamically adjust its position along the scalp surface, transitioning from static manual placement to active automated positioning that continuously optimizes electrode-skin contact for consistent high-precision measurements
Solution Approach 2:
The system incorporates sensors that detect electrode contact quality and scalp surface characteristics, providing real-time feedback to the control system which then adjusts electrode positions via linear actuators to maintain optimal contact, ensuring consistent measurement precision across multiple uses and subjects
4Measurement precision
If high-density EEG systems are used, then the measurement precision improves, but the ease of operation and accessibility decrease
Solution Approach 1:
The EEG cap incorporates automated adjustment mechanisms that perform cap sizing, electrode positioning, and contact optimization without requiring manual intervention or specialized operator skills, enabling users to independently set up and operate the high-density EEG system while maintaining measurement precision
Solution Approach 2:
Manual mechanical adjustment of electrodes and cap fit is replaced with automated linear actuators and control systems that use electronic sensing and actuation to achieve precise positioning, reducing the skill level required for operation while maintaining or enhancing measurement precision
Data Source
AI summary
A system for precision psychiatry includes a wearable device including a cap and EEG electrodes attached thereto, the cap configured to be placed over a head of a user and including a plurality of first linear actuators configured to expand and contract to increase and decrease a size of the cap, respectively, the EEG electrodes connected to the cap via a plurality of second linear actuators configured to expand and contract to move the EEG electrode toward and away from, respectively, a scalp of the user, a processing device configured to be connected to the EEG electrodes of the wearable device to know the 3-D location of the EEG electrodes and to receive brain activity signals therefrom, the processing device generating a neurofeedback signal based on a detected aberrant brain activity, and a feedback device providing the neurofeedback signal to the user.