In Parkinson disease, dopamine production becomes irregular and inadequate and nerve cells cannot properly transmit messages. This results in the loss of muscle function. By providing an even, adequate supply of medication that the body converts into dopamine, neurons are able to transmit messages and tremors improve.
Review Date 8/13/2015
Updated by: Joseph V. Campellone, MD, Division of Neurology, Cooper University Hospital, Camden, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.