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Researchers from the Institute of Photonics at the University of Strathclyde (Glasgow), have integrated a 10x10 array of glass microneedles with an array of micro LEDs so as to be able to independently illuminate all 100 needle tips as well as 81 interstitial sites.
Implanted at the surface of the brain, the LED-lit microneedles can deliver light to 181 different sites (1.5mm deep), each providing sufficient light to optogenetically excite hundreds of neurons in vivo, according to the researchers.
Completed device with polymer-coated wire bonds for the
independent control of the microLEDs.
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