The four initial primary symptoms of Parkinson's are:
- tremor or trembling mostly in the hands, arms, and jaw
- rigidity or stiffness of the limbs and trunk
- slowness of movement (bradykinesia)
- postural instability or impaired balance and coordination.
Early symptoms are subtle and occur gradually.
Revised and reviewed by Prof Carr February 2015. Reviewed by Dr Andrew Rose-Innes, MD, Department of Neurology, Yale University School of Medicine, New Haven.