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.
People with akathisia are unable to sit or keep still, complain of restlessness, fidget, rock from foot to foot, and pace. The term was coined by the Czech neuropsychiatrist Ladislav HaÅ¡kovec (1866â1944), who described the phenomenon in 1901.