Parkinson's disease is a movement disorder characterized by rigidity, tremors (typically at rest), and slow movement (bradykinesia).
Additional features supporting the diagnosis of Parkinson's disease include:
Parkinsonism may be caused by a variety of etiologies including prior ischemic events; severe head injury; other neurologic, medical, metabolic, genetic and psychiatric disorders; as well as medications and toxins.
Parkinson's disease can be diagnosed only after other causes of Parkinsonism have been excluded.
The diagnosis of Parkinson's disease is made clinically because there is no readily available diagnostic test.
Consult a neurologist to confirm the diagnosis in patients with early Parkinson's disease, those with atypical symptoms, and those with the onset of symptoms before the age of 50.