Essential Tremor vs. Parkinson’s: How to Tell the Difference

When a person notices their hands starting to shake, the mind often jumps to one conclusion: Parkinson’s Disease. However, tremors are incredibly common and can stem from various neurological conditions—the most frequent being Essential Tremor (ET).

While both conditions involve involuntary shaking, they are fundamentally different in how they progress and how they are treated. At IGEA Brain, Spine, Pain & Orthopedics, our neurology and neurosurgery teams specialize in distinguishing these "shaking" disorders to ensure patients receive the correct intervention early.

1. The “When”: Action vs. Rest

The most significant difference between Essential Tremor and Parkinson’s is when the shaking occurs.

• Essential Tremor (Action Tremor): This tremor is most prominent when you are using your hands. It shows up when you are tying your shoes, drinking from a glass, or writing. When your hands are resting in your lap, the shaking usually stops.
• Parkinson’s Disease (Resting Tremor): This tremor occurs when your muscles are at rest. You might notice your hand shaking while it sits on a table or hangs by your side. Interestingly, the tremor often disappears or diminishes when you reach for an object or start a task.

2. Affected Body Parts

While both conditions typically begin in the hands, they tend to travel through the body differently.

• Essential Tremor: Usually affects both sides of the body equally. In addition to the hands, it frequently affects the voice, causing a quivery sound, and the head, creating a "yes-yes" or "no-no" motion. It rarely affects the legs.
• Parkinson’s Disease: Often starts on one side of the body and may stay worse on that side. It commonly affects the chin, lips, and legs. It rarely involves the voice or head directly in the early stages.

3. Associated Symptoms

Parkinson’s is a systemic neurological condition, meaning it affects more than just movement. Essential Tremor, by contrast, is generally isolated to the tremor itself.

Parkinson’s Red Flags:

• Bradykinesia: General slowness of movement
• Rigidity: Stiffness in the limbs or trunk
• Postural Instability: Stooped posture or balance issues
• Micrographia: Handwriting that becomes very small and cramped

Essential Tremor Signs:

• The tremor may actually improve temporarily with a small amount of alcohol, though this is not a recommended treatment
• The condition is often hereditary; about 50% of cases involve a family history

How IGEA Diagnoses Movement Disorders

Because there is no single blood test for these conditions, a diagnosis relies on the expertise of a Movement Disorder Specialist. At IGEA, we use a comprehensive evaluation process:

1. Neurological Exam: We observe your gait, muscle tone, and the specific frequency of the tremor.
2. DaTscan: This specialized imaging test evaluates the dopamine system in the brain. A normal DaTscan usually points toward Essential Tremor, while an abnormal result often confirms Parkinson’s.
3. Trial Medications: Sometimes, a positive response to specific medications, such as Levodopa for Parkinson’s or Propranolol for ET, helps confirm the diagnosis.

Treatment Options

Whether you are diagnosed with ET or PD, the specialists at IGEA provide a spectrum of relief options:

• Conservative Care: Specialized medications and physical therapy to improve fine motor skills
• Deep Brain Stimulation (DBS): For patients whose tremors are no longer controlled by medication, DBS acts like a pacemaker for the brain, sending electrical impulses that block the tremors
• CyberKnife® Radiosurgery: A non-invasive option for certain types of tremors that cannot be treated surgically

Why Choose IGEA?

With locations across New Jersey and New York, IGEA Brain, Spine, Pain & Orthopedics brings university-level neurosurgical expertise to your neighborhood. Our surgeons, including Dr. Ciro G. Randazzo and Dr. Adam Lipson, are leaders in neuromodulation and movement disorder care.

Frequently Asked Questions (FAQ)

Can you have both Essential Tremor and Parkinson’s?

It is rare, but possible. Some studies suggest that people with Essential Tremor may have a slightly higher risk of developing Parkinson’s later in life, making regular neurological check-ups essential.

Is Essential Tremor life-threatening?

No, ET is not a life-threatening condition. However, it can be life-altering, making it difficult to eat, write, or work, which is why we focus heavily on restoring function.

Is Parkinson’s hereditary?

While most cases are sporadic (random), a small percentage are linked to specific genetic mutations. If you have a strong family history, our specialists can discuss the implications with you.

Get the Answers You Need

A tremor is your body’s way of saying something is off in the nervous system. Don’t spend your time worrying about what if—get a definitive diagnosis from the experts at IGEA.

Call us at (866) 467-1770 or Book Your Appointment Online.