A neural suppressor was a device capable of suppressing the teleptahic abilities of a telepathic being.

In the mirror universe, Lwaxana Troi had neural suppressors implanted in both of her daughters in order to make it easier to control them. When Jean-Luc Picard infiltrated Lwaxana's establishment, the Sacred Chalice, he had a neural suppressor that was able to keep people from reading his mind rather than suppressing any abilities he had. (TNG - Mirror Universe short story: "The Sacred Chalice")

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