Top definition. matrix. a term describing a controlled environment or situation in which people act or behave in ways that conform to roles pre-determined by a powerful person(s) who decides how the world is supposed to function.
Akathisia is a movement disorder characterized by a feeling of inner restlessness and a compelling need to be in constant motion, as well as by actions such as rocking while standing or sitting, lifting the feet as if marching on the spot, and crossing and uncrossing the legs while sitting.
(1) Restless leg syndrome/Willis-Ekbom disease (jimmy legs). (2) Motor restlessness ranging from a sense of inner restlessness to inability to sit or lie still, fidgeting, rocking from foot to foot and pacing, accompanied by a sensation of muscular quivering and an urge to stay in constant motion. Akathisia is a common extrapyramidal effect of neuroleptic and antipsychotic drug therapy.