Multi-Wavelength Neural Probe Heat Management
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Solution Overview
Problem
Conventional neural probes using light emitting diodes for optogenetics face limitations due to heat generation, which can compromise neural tissue behavior even at minimal temperature increases, restricting the use of multiple light sources without causing disruptive tissue heating.
Innovation Solution
The development of high-efficiency light sources, including LEDs emitting in various wavelengths, are integrated into a neural probe, each with a low power output to minimize heat generation, allowing for multiple sources to be used simultaneously without causing significant tissue temperature increases, with a temperature change of 0.022° C. to 0.041° C., compared to 2° C. with conventional probes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple conventional light emitting diodes are used in a neural probe, then the ability to activate different neuron sets is improved, but the heat generation increases causing disruptive temperature increases in neural tissue
Solution Approach 1:
The invention divides the light source system into multiple separate light emitting diodes, each targeting specific neuron sets with different wavelengths. This segmentation allows independent control of each LED's activation patterns, enabling selective neuronal stimulation while distributing heat generation across multiple low-power sources rather than concentrating it in a single high-power source.
Solution Approach 2:
The invention changes the operational parameters of the light emitting diodes by using multiple LEDs with lower individual power outputs instead of fewer LEDs or a single high-power source. Each LED operates at reduced power levels (e.g., 10 mW or less), which maintains sufficient light intensity for optogenetic activation while keeping heat generation below disruptive thresholds for neural tissue.
2Illumination intensity
If high power light sources are used, then the light output intensity is sufficient to trigger light-sensitive reactions, but the heat generation causes disruptive temperature increases
Solution Approach 1:
The total light output requirement is segmented across multiple light emitting diodes rather than relying on a single high-power source. Each LED contributes a portion of the total illumination needed for optogenetic activation, and their combined effect achieves the necessary light intensity while each individual source generates minimal heat.
Solution Approach 2:
The invention combines the output of multiple low-power light emitting diodes to achieve the cumulative light intensity required for effective neuronal activation. By merging the optical output of several LEDs operating at low power levels, the system attains sufficient illumination intensity without the heat generation problems associated with high-power single-source approaches.
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 enables the use of multiple wavelength sensitivities in a single probe, effectively activating different neuron sets without disruptive heat increases, enhancing the precision and safety of optogenetic applications, such as treating diseases like Parkinson's, epilepsy, chronic pain, and depression.
Implementation Method 1
High-efficiency light emanating diodes (LEDs) are disposed within the probe body
Implementation Method 2
The field of optogenetics involves genetically modifying organisms to express sensitivity to light, providing the ability to selectively control neurons in living organisms
Implementation Method 3
each LED has a sufficiently low power output, such that a combined heat output of multiple LEDs does cause a disruptive temperature increase in the neighboring tissues
Data Source
AI summary
Probes include a probe body configured to penetrate biological tissue. High-efficiency light sources are positioned within the probe body. Each high-efficiency light source has a sufficiently intense light output to trigger a light-sensitive reaction in neighboring tissues and has a sufficiently low power output such that a combined heat output of multiple light sources does cause a disruptive temperature increase in the neighboring tissues.