The performance of acts without conscious will, as, for example, after an attack of epilepsy or concussion of the brain. In such conditions the person may perform acts of which he or she is neither conscious at the time nor has any memory afterwards. It may also be provoked by alcohol or PSYCHEDELIC DRUGS. It may occur also following hypnosis, mental stress or strain, or conditions such as FUGUE or somnambulism (see SLEEP). The condition is of considerable importance from a legal point of view, because acts done in this state, and for which the person committing them is not responsible, may result in criminal prosecution where automatism might serve as a defence.