An implant worn by the Betazoid student Tarima Sadal in Star Trek: Starfleet Academy that holds back the full strength of her telepathy, until she tears it out to save her friends.
In Star Trek: Starfleet Academy, a neural inhibitor is the implant that restricts the telepathic power of Tarima Sadal, a young Betazoid whose abilities are far stronger than is usual for her people. It was fitted to protect her, and for years it has kept her gift within safe limits.
The device becomes central in the first-season episode Come, Let's Away. When cadets are taken hostage aboard the derelict USS Miyazaki by the scavengers known as the Furies, Tarima offers to push past the implant and reach Caleb Mir through their emotional bond.
She finally rips the inhibitor out and unleashes a telepathic attack that saves the cadets. The effort leaves her in a critical condition, and the Doctor places her in a medically induced coma.