Noun
alien hand syndrome (countable and uncountable, plural alien hand syndromes)
(neurology, psychiatry) A condition in which a person experiences their limbs acting seemingly on their own, without control over the actions.
Synonym: Dr. Strangelove syndrome
Alien hand syndrome is one of these puzzles- with its sufferers having one of their hands, usually the non-dominant one, acting as if it has a mind of its own. Source: Internet