How is Essential Tremor diagnosed?

Essential Tremor is primarily a clinical diagnosis made through a comprehensive physical and neurological examination, as there is currently no specific blood test or imaging scan that can definitively identify it. Physicians diagnose Essential Tremor by documenting rhythmic shaking during voluntary movement and ruling out other neurological conditions that present with similar symptoms.

How is Essential Tremor diagnosed?

There is no "gold standard" laboratory test for Essential Tremor. Instead, a specialist, typically a neurologist or a movement disorder specialist, performs a detailed assessment. They will evaluate your tremor while you are at rest, while you maintain a posture (like holding your arms out), and during specific tasks like handwriting or pouring water. Because Essential Tremor is often a diagnosis of exclusion, your doctor will carefully review your medical history and medications to ensure the tremor is not a side effect of other drugs or an underlying metabolic issue.

What is the diagnostic process and differential diagnosis?

The diagnostic journey can be frustrating, and many patients experience a "diagnostic odyssey" before finding answers. Because Essential Tremor is often confused with other conditions, doctors must distinguish it from:

• Parkinson’s disease: Which typically involves tremors at rest rather than during movement.


• Dystonic tremor: Often associated with abnormal postures.


• Drug-induced tremors: Caused by medications like lithium or certain asthma inhalers.


• Enhanced physiological tremor: Often caused by caffeine, anxiety, or thyroid dysfunction.

What tests are used in the evaluation?

While no single test confirms Essential Tremor, your physician may order specific tests to rule out mimics:

1. Blood tests to check thyroid function and electrolyte levels.


2. Brain imaging (MRI or CT) to rule out structural issues like strokes or tumors.


3. DaTscan (in specific cases) to differentiate Essential Tremor from Parkinsonian tremors.


4. Detailed review of all current prescription and over-the-counter medications.

At DiseaseMaps.org, 62 community members living with Essential Tremor have shared their journeys, highlighting the importance of advocating for yourself. If your primary care provider is unfamiliar with the nuances of movement disorders, seeking a consultation with a fellowship-trained movement disorder specialist is vital to ensure an accurate Essential Tremor diagnosis.

Next steps

• Consult a board-certified neurologist or a movement disorder specialist.


• Keep a "tremor diary" noting when the shaking is most severe and what triggers it.


• Join the community at DiseaseMaps.org to connect with others who have navigated the diagnostic process for Essential Tremor.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Essential Tremor.


• International Parkinson and Movement Disorder Society (MDS) diagnostic criteria.


• The International Essential Tremor Foundation (IETF).


• Orphanet: Essential tremor (ORPHA:3335).