Parkinson�s Disease: Diagnosis
Parkinson's disease (PD) is a progressive movement disorder. PD is characterized by:
- Slowing down of movements (bradykinesia)
- Tremor at rest
- Muscle rigidity
- Loss of reflexes that maintain posture and equilibrium
Part of the Brain Affected by PD—Yellow Section
Copyright © Nucleus Medical Media, Inc.
PD is caused by a loss of certain nerve cells in the brain. The loss of these cells causes a decrease in the amount of a brain chemical called dopamine. Low dopamine levels cause PD symptoms.
The brain cells may be lost because of genetic defects, the environment, or some combination of the two. A small amount of people with PD have an early-onset form. This type is caused by an inherited gene defect.
Last reviewedSeptember 2013by Rimas Lukas, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.