involuntary,adj. Not resulting from a free and unrestrained choice; not subject to control by
the will. — involuntariness,n.
“[T]he law, like everyday thought, usually confines the notion of involuntary to that subclass
of cases which involve purely physical, physiological, or psychological movements of our limbs, like reflexes and convulsions, movements in sleep, during sleepwalking, or under hypnosis, or due to some disease of the brain, lunacy, or automatism.” Alan R. White, Grounds of Liability 60–61 (1985).
[Blacks Law 8th]