A slug-like parasite that fastens on the brain stem and leaves its host unable to resist questioning, used by the Romulan Nero on Captain Christopher Pike.
The Centaurian slug is a small invertebrate used as an instrument of interrogation. Swallowed by the victim, it attaches itself to the brain stem and releases a toxin that leaves the host unable to withhold answers.
It appears in the 2009 film Star Trek. Captain Pike, a prisoner aboard the Romulan mining ship Narada after surrendering himself at Vulcan, refuses to give Nero the frequencies of Starfleet's defences around Earth. Nero has a slug forced down his throat, and Pike in time gives up the codes.
Pike is rescued by Kirk and Spock but the creature leaves lasting damage. He is seen in a wheelchair at the end of the film, and walks with a cane in the sequel.