Originally posted by Storm
It happens by itself, or can be the result of a sleep disorder.Ceterum censeo OTF esse delendam.
Close. It occures when somebody is disturbed during their deep sleep (post R.E.M. sleep) by sounds, touch and such, or by their own brainactivities. The person slips in a state of half-sleep in which the mind becomes partially aware and active, causing the person to move and talk.
It's not caused by dreaming as some might think.