Optogenetic Cortical Implant for High-Resolution Visual Restoration

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Solution Overview

Problem

Current methods for restoring sensory functions, particularly visual responses, in individuals with sensory impairments or blindness lack the precision and effectiveness in replicating natural sensory perceptions, as they bypass natural sensory pathways and rely on incomplete stimulation of cortical columns.

Innovation Solution

A system comprising an implant with an emitter array and detector array that stimulates and monitors thalamic inputs to the neocortex, specifically the primary visual cortex, using optogenetics to activate hypercolumns with precise light emissions and detect bioluminescent responses, allowing for real-time calibration and accurate stimulation of cortical columns to replicate natural visual perception.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If current methods bypass natural sensory pathways to restore visual responses, then sensory restoration is achieved, but precision and effectiveness in replicating natural sensory perceptions deteriorates

Engineering Contradiction:

Improvesensory restoration effectivenessVSAvoidprecision in replicating natural sensory perceptions

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent introduces optogenetic proteins as an intermediary mechanism that bridges the gap between artificial stimulation and natural sensory processing. By genetically modifying sensory neurons to express light-sensitive proteins, the system creates a faithful transduction pathway that preserves the precision of natural sensory perceptions while enabling artificial restoration through light emission.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces degraded or non-functional natural sensory transduction mechanisms with optogenetic light-based stimulation. Instead of attempting to repair complex mechanical and biochemical sensory pathways, the invention substitutes them with a simplified light-emission-to-neural-activation mechanism that achieves more precise and effective sensory restoration.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If cortical columns are stimulated with light emissions, then visual responses are restored, but noise and heat exposure to brain tissue increases

Engineering Contradiction:

Improvevisual response restorationVSAvoidnoise and heat exposure to brain tissue

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs targeted optogenetic stimulation where light-emitting implants are positioned to activate specific cortical columns corresponding to precise visual field locations. This localized stimulation approach minimizes unnecessary heat exposure and noise to surrounding brain tissue while maintaining effective visual response restoration in the targeted regions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system uses controlled, periodic light emission pulses to stimulate cortical columns rather than continuous illumination. This periodic activation reduces cumulative heat exposure to brain tissue while maintaining sufficient stimulation effectiveness for visual response restoration, as the neural tissue has time to dissipate heat between pulses.

Inventive Principle:

Principle #19Periodic action

3Reliability

If natural sensory pathways are bypassed, then sensory function restoration is achieved, but the complexity of the implant system increases

Engineering Contradiction:

Improvesensory function restorationVSAvoidimplant system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts and isolates the essential function of sensory transduction by using optogenetic proteins that convert light directly into neural signals. This extraction simplifies the implant system by removing the need for complex mechanical transducers, electrical contacts, or biochemical interfaces, leaving only the light-emitting component and the genetically modified neurons.

Inventive Principle:

Principle #2Taking out (Extraction)

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 system enables precise and effective restoration of sensory perceptions by accurately stimulating and monitoring cortical columns, achieving high-resolution artificial vision that closely mimics natural visual experiences, reducing noise and heat exposure to brain tissue.

Implementation Method 1

respective ones of the plurality of emitters are configured to emit light toward the array of cortical columns

Methodology Applied

Scientific EffectLight emission: Light

Implementation Method 2

respective ones of the plurality of detectors are configured to detect response signals from brain tissue of the user that has been excited by a light emission

Methodology Applied

Scientific EffectBioluminescence detection: Bioluminescence

Data Source

PatentUS20240165421A1Stimulated cortical response

Publication Date: 2024.05.23 THE RES FOUNDATION FOR THE STATE UNIV OF NEW YORK

AI summary

There is set forth herein: an implant adapted for implantation in a user having a neocortex at least part of which has been made responsive to light, the neocortex including a plurality of columns forming an array of cortical columns capable of description by a cortical map characterizing, identifying or defining a location or topographical relationship and placement for respective ones of the plurality of columns; wherein the implant includes an emitter array; wherein the emitter array includes a plurality of emitters, wherein respective ones of the plurality of emitters are configured to emit light toward the array of cortical columns.