Parkinson's Disease Diagnosis
Parkinson's disease is mainly diagnosed clinically by a neurologist through medical history review and neurological examination. There is no single blood test for Parkinson's disease.
How is Parkinson's disease diagnosed?
- A neurologist (movement-disorder specialist) reviews your history and symptoms.
- A detailed neurological exam checks movement, balance, reflexes, sensation, and thinking.
- The doctor looks for characteristic motor symptoms and response to medication.
- Diagnosis may require follow-up visits to observe symptoms over time.
Tests that may be performed
- Blood tests: to exclude other metabolic or infectious causes.
- Brain imaging (MRI, CT, ultrasound): usually normal in Parkinson's but rules out other conditions.
- Dopamine transporter (DAT) scan: shows dopamine activity; supports diagnosis in selected cases.
- Genetic testing: when symptoms start early or family history is strong.
- Medication trial: response to Parkinson's medicines helps clarify diagnosis.
Conditions that can look similar
- Essential tremor: mainly action tremor, often without slowness or stiffness.
- Drug-induced parkinsonism: caused by certain psychiatric or anti-nausea medicines.
- Atypical parkinsonian disorders (multiple system atrophy, PSP, corticobasal syndrome).
- Vascular parkinsonism related to multiple small strokes.
Charlie Shine, Ph.D. | Brain Scientist | shcbrain@yahoo.com | brains4goodlife.com