[Neurochemical mechanisms of tremor in Parkinson's disease].

Tremor is one of the main motor symptoms of Parkinson's disease, and its pathophysiology remains largely unknown. The clinical and pathomorphological heterogeneity of tremor and the not always response to therapy complicate the task of researchers and clinicians. This review discusses the specific degeneration of neurotransmitter systems driving the development of tremor, and the influence of neurotransmitters on specific anatomical entities according to current models explaining tremor.