Automatism may refer to: Automatic behavior, spontaneous verbal or motor behavior; an act performed unconsciously. Defendants have been found innocent due to an automatism defense (for example, homicide while sleepwalking). Automatism (law), a defence to liability. See also Automatism (case law) Automatism (toxicology), when an individual repeatedly takes a medication because the individual forgets previous doses, potentially leading to a drug overdose Automatic writing, the process, or prod… (More on Automatism)