Automatism
Automatism is the practice or theory of the spontaneous production of words (speech or writing), drawing, painting or other creative production, or behavior in general, without conscious self-control or self-censorship.
Mediumistic automatism, in which the speech, writing or behaviour produced is purported to be communicated from ghosts, spirits or the like, channeling through a psychic or medium
Surrealist automatism is an artistic technique of spontaneous writing, drawing, or the like practiced without conscious aesthetic or moral self-censorship.
In law, automatism is the state of acting involuntarily, as in sleepwalking. (Sleepwalking — Insanity or Automatism)