DYSKINESIAS AND EXTRAPYRAMIDAL MOTOR DISO RDERS - TERMINOLOGY, DEFINITIONS AND DIAGNOSTIC-APPROACH - WITH SPECIAL REGARD TO DYSTONIA

In this paper we discuss the nomenclature and criteria for defining dy skinesias. We propose using uniform terminology and classification to facilitate clinical and scientific communication. Next to the clinical examination the neurophysiological methods are of value in establishi ng the diagnosis when dealing with an involuntary movement. We summari ze the main characteristics of some idiopathic dystonic disorders desc ribed in recent years and stress the importance of molecular genetics. Magnetic resonance imaging and metabolic analyses are the methods of first choice when a symptomatic dystonia is suspected.