Neural Implant Anchor Angles for Secure Skull Attachment
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Solution Overview
Problem
Current neural interface systems for monitoring brain activity are either cumbersome and require daily re-pasting of electrodes on the scalp or involve invasive surgeries for intracranial placement, posing discomfort and surgical risks.
Innovation Solution
A neural interface system with an implantable component that includes a housing with anchor attachment structures for secure subcutaneous placement against the skull, along with a wearable device for continuous EEG signal recording and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If scalp electrodes are used for monitoring brain activity, then the system can be placed external to the scalp, but daily re-pasting of electrodes is required which is uncomfortable and cumbersome for patients
Solution Approach 1:
The device is divided into two separate components: an implantable unit that remains permanently positioned under the scalp, and a wearable headpiece that can be removed and reapplied daily. This segmentation allows the implant to provide stable anchoring while the external headpiece handles the interface with scalp electrodes, eliminating the need for daily repositioning of the implant itself.
Solution Approach 2:
The implantable unit serves as an intermediary component between the scalp electrodes and the external wearable device. It provides a stable anchor point under the scalp that connects to electrodes without requiring direct attachment to the skull, while also interfacing with the removable wearable headpiece that contains additional electronics and battery.
2Reliability
If intracranial devices are placed inside the skull for neurostimulation and high resolution EEG recordings, then stable recordings and neurostimulation are enabled, but extensive surgery (craniotomy) is required with direct contact between electrodes and brain
Solution Approach 1:
Instead of placing electrodes directly inside the skull (intracranial), the device inverts the approach by placing the implantable unit and electrodes outside the skull (extracranial) under the scalp. This provides stable recordings through direct contact with the skull and brain surface without requiring craniotomy or penetration of the skull, thereby eliminating the associated surgical risks while maintaining recording stability.
Solution Approach 2:
The implantable unit utilizes a flexible, biocompatible encapsulation that allows it to conform to the contours of the skull and scalp tissue. This flexible housing enables stable positioning and contact with the skull surface without rigid fixation, reducing surgical complexity and risk while maintaining reliable electrical contact for EEG recording.
3Reliability
If anchor attachment structures are arranged at angles greater than 90° and less than 180° on the implant base, then improved attachment and anchoring to the skull is achieved, but the housing structure becomes more complex
Solution Approach 1:
The anchor attachment structures are arranged asymmetrically on the implant base with specific angle requirements (greater than 90° and less than 180°). This asymmetric configuration optimizes the mechanical distribution of forces during implantation and provides improved anchoring to the skull by leveraging the natural curvature and geometry of the implantation site, while the complexity is managed through standardized manufacturing processes.
Data Source
AI summary
An implant for a neural interface system includes a housing including a base and a flexible portion. The implant further includes at least two anchor attachment structures disposed at the base and arranged at an angle of greater than about 90° and less than about 180° with respect to one another as defined from an approximate center of the base. The anchor attachment structures can be connected by a curved connecting member disposed at a patient-facing surface of the base.