Catatonia was a condition characterized by abnormality of movement and behavior arising from a disturbed mental state.
Antedeans entered a self-induced catatonic state to survive the ordeal of spaceflight which they found extremely traumatic. (TNG: "Manhunt")
In 2367, Andrus Hagan was found aboard the USS Brattain in a profound catatonic state. (TNG: "Night Terrors")
In 2372, several USS Voyager crewmembers became catatonic as the result of Botha telepathy. (VOY: "Persistence of Vision")