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Re:A new brain implant automatically detects and kills pain ... by letswim420 on Tuesday July 06, 2021 @04:07PM (#27753597)
Don't have access to the PDF but they might be using https://en.wikipedia.org/wiki/Optogenetics

This requires genetically engineered mice, which is why they only have this working for mice?

Re:A new brain implant automatically detects and kills pain ... by jahabrewer on Tuesday July 06, 2021 @04:29PM (#27753827)
Article specifically says they use optogenetics.