Benign Stupor

Benign stupor, also referred to as depressive stupor, Kahlbaum syndrome, or retarded catatonia, was first described by a New York psychiatrist August Hoch in 1887. It is a state characterized by apathy, inactivity, immobility, or negativism. It consists of movement that is inhibited by mutism, posturing, rigidity and repetitive actions, including weakened response to stimulation especially painful ones.

Benign stupor is commonly described as the most severe form of manic-depressive disorder having a generally favorable prognosis, as contrasted to malignant stupor which exhibit a more classical deterioration course.