Parkinson’s disease is generally thought of as a disease that only involves movement. But in addition to so-called motor symptoms such as slowness of movement, tremor and stiffness, most people develop other health problems related to Parkinson's. These symptoms are diverse but are collectively known as non-motor symptoms.
It’s important to realize that non-motor symptoms are common and can be more troublesome and disabling than motor symptoms. That’s why you should watch for these symptoms and discuss early changes with your doctor. Research shows that people develop some non-motor symptoms, like depression, sleep problems and loss of smell, years before they get a Parkinson’s diagnosis.
Non-motor symptoms can include:
- Mood disorders such as depression, anxiety and irritability
- Cognitive changes such as problems with focused attention and planning, slowing of thought, language and memory difficulties, personality changes, dementia
- Hallucinations and delusions
- Orthostatic hypotension (a drop in blood pressure when standing, light-headedness)
- Sleep disorders such as insomnia, excessive daytime sleepiness (EDS), rapid eye movement behavior disorder (RBD), vivid dreams, talking and moving during sleep, restless legs syndrome (RLS)/periodic leg movements disorder (PLMD)
- Constipation and early satiety (a feeling of fullness after eating small amounts)
- Vision problems
- Excessive sweating, especially of hands and feet, with no or little exercise
- Increase in dandruff (seborrhea dermatitis) or oily skin
- Urinary urgency, frequency and incontinence
- Loss of sense of smell
- Sexual problems
- Weight loss or weight gain
- Impulsive control disorders such as binge eating, excessive shopping or gambling, usually a side effect of medications
Mixed motor and non-motor symptoms
The same PD symptoms that occur in muscles of the body – tremor, stiffness and slow movement – can occur in the muscles used in speaking and swallowing, resulting in the following changes:
- Soft voice
- Drooling or excessive saliva due to slow swallowing
- Speech and swallowing problems
Page reviewed by Dr. Joash Lazarus, NPF Movement Disorders Fellow, Department of Neurology at Emory University School of Medicine.