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 1/19/2018
Updated by: Joseph V. Campellone, MD, Department of Neurology, Cooper Medical School of Rowan University/Cooper University Hospital, Camden, NJ. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.