Minimally Invasive Electrode Arrays for High-Bandwidth Brain Interfaces
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Solution Overview
Problem
Conventional neural interfaces face challenges in achieving high spatial and temporal resolution while minimizing collateral damage to brain tissue, and they are either non-invasive with poor signal quality or invasive with high risks and limited scalability.
Innovation Solution
Minimally invasive methods using electrode arrays delivered through subdural space, ventricles, or blood vessels, guided by real-time imaging and electrophysiologic modules, allowing precise placement and high-bandwidth recording/stimulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional invasive methods (craniotomy, depth electrodes, DBS) are used to achieve high spatial and temporal resolution, then recording and stimulation quality improves, but tissue damage and surgical risk increase
Solution Approach 1:
The patent introduces an intermediary delivery system consisting of a delivery catheter and guide wire that enable electrode arrays to be placed in the subdural space without requiring craniotomy. The delivery catheter acts as a mediator to transport the electrode array through the ventricular system and into the target location, eliminating the need for direct skull opening while maintaining high spatial resolution recording capability.
Solution Approach 2:
The patent replaces the mechanical craniotomy system with a minimally invasive catheter-based delivery system. Instead of mechanically opening the skull to access the brain surface, the system uses a percutaneous catheter approach through the ventricular system to deliver electrodes, substituting a less invasive mechanical pathway while achieving the same spatial resolution.
2Measurement precision
If conventional invasive methods are used to achieve high spatial and temporal resolution, then recording and stimulation quality improves, but surgical complexity and risk increase
Solution Approach 1:
The delivery catheter serves as an intermediary that simplifies the surgical approach by providing a pre-assembled delivery mechanism. The catheter is inserted through a small percutaneous opening and navigated through the ventricular system, eliminating the need for complex craniotomy procedures while maintaining the ability to place electrodes with high temporal resolution recording capability.
3Object-affected harmful factors
If non-invasive methods (EEG, MEG) are used to avoid tissue damage, then safety improves, but spatial and temporal resolution deteriorates
Solution Approach 1:
The patent segments the electrode array into multiple independently addressable recording channels distributed across the subdural surface. This segmentation allows the system to achieve high spatial resolution by recording from multiple discrete locations simultaneously, while maintaining minimally invasive placement through the catheter delivery system.
Solution Approach 2:
The patent transitions from non-invasive external recording to minimally invasive internal recording by placing electrodes in the subdural space. This dimensional change from outside-the-skull to inside-the-skull (but outside-the-brain-tissue) approach enables high spatial resolution while maintaining safety, bridging the gap between non-invasive and traditionally invasive methods.
4Measurement precision
If depth electrodes are used to achieve high spatial and temporal resolution, then recording quality improves, but the number of electrodes that can be safely placed is limited
Solution Approach 1:
The patent segments the recording function across multiple electrodes distributed on the subdural surface rather than concentrating them at deep brain locations. This segmentation allows many more electrodes to be placed safely on the brain surface compared to the limited number of depth electrodes that can be inserted into brain tissue, while maintaining high spatial resolution through the distributed array.
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
Provides high spatial and temporal resolution with reduced tissue damage, safer, cheaper, and more scalable than traditional invasive methods, enabling treatments for epilepsy, blindness, paralysis, and other neurological conditions.
Implementation Method 1
one or more electrode arrays configured to be minimally invasively inserted to a target area of the nervous system
Implementation Method 2
an imaging module configured to provide real-time information related to a location of the one or more electrode arrays
Implementation Method 3
an electrophysiologic guidance module configured to detect a position of the one or more electrode arrays
Data Source
AI summary
Systems and methods for high-bandwidth, minimally invasive brain-computer interfaces (BCIs) are disclosed. The BCIs are configured for deployment and operation in conjunction with a comprehensive interventional electrophysiology procedural suite. Three primary methods of minimally invasive electrode array delivery are disclosed: (1) cortical surface delivery, (2) ventricular delivery, and (3) endovascular delivery. Additionally, systems and methods for interacting with such high-bandwidth electrode arrays are discussed, including real-time imaging, signal processing, and neural decoding. Systems and methods for architectures for accelerating the underlying computational processes (such as graphics processing units or tensor processing units) are also discussed. Multiple applications of BCIs are discussed, with emphasis on restoration, rehabilitation, and augmentation of neurologic function.