Need to Know: What Is a Tremor?

Need to Know: What Is a Tremor?
ms in moderation

Editor’s note: “Need to Know” is a series inspired by common forum questions and comments from readers. Have a comment or question about MS? Visit our forumThis week’s question is inspired by the forum topic “Tremors Caused by MS from April 30, 2018.

What’s shaking?

If you have MS, your answer is likely to refer to at least one part of your body. Tremor describes an uncontrolled, rhythmic movement like shaking or twitching. It’s a symptom that as many as 75 percent of people with MS experience.

For some, tremor is a minor nuisance, but for others, it can be a major occurrence. Those with severe tremor (up to 6 percent of all people with MS) may need treatment to reduce its impact on daily living.

What causes tremor in MS?

MS causes misfiring of brain signals to different parts of the body.

In the case of the muscles, signals from the brain may become confused (thanks to demyelination) and result in repetitious relaxing and contracting of muscle groups that typically work opposite one another. This causes the rhythmic movements characteristic of tremors.

MS tremor: 4 types

There are four main types of MS tremor:

Intention tremor

These occur following a smooth movement by the hand or foot. A person with an intention tremor may reach for a cup of coffee, only to find their hand beginning to shake when they grasp the cup’s handle.

Postural tremor

When a person with postural tremor stands up or sits down, the weight-bearing motion in between leads to “antigravity” shaking.

Nystagmus tremor

You know this type of tremor as the one that seizes your eyelid and makes it twitch uncontrollably.

Resting tremor

Simply put: This happens when your body is at rest. Resting tremor characterizes Parkinson’s disease, but it can also happen to people with MS.

New research on measuring tremor

It’s clinically important to measure tremor severity if doctors are to treat it. Yet, it’s difficult to do so. Clinical observation and self-reporting are often the only way to assess this symptom.

Simply witnessing tremors doesn’t provide measurable data. Patients may be asked to pour water from cups, draw spirals, or demonstrate tremor-affected handwriting, but this only proves it’s a symptom. None of these efforts accounts for objective severity.

Scaling the severity of tremor in people with MS can drive research into adequate therapies that can reduce, or potentially eliminate, this disabling symptom.

Currently, treatments for tremor are limited to a handful of off-label medications and the use of limb weights to counteract tremor movement. Experimental options include deep brain stimulation, alcohol, and THC.

Some measurement tools do exist, such as sensors that incorporate accelerometry. These sensors cull objective data on the amplitude, frequency, and occurrence of tremor activity. However, they’re hard to access, and most aren’t scientifically validated.

Another tool, the inertial sensor, can be wonky when it comes to trapping signal noise, which may or may not be a tremor, making data collected from these sensors difficult to interpret.

More of an issue with the current sensor options is that they are currently used to measure only the most common tremor found in Parkinson’s disease, resting tremor, and none have been tested against all forms of MS-related tremor.

Introducing electromagnetic motion tracking

Research published in the Journal of Neuroscience Methods in January highlights the possibility of an electromagnetic tracking sensor called TREMBAL that may be used to measure and rate tremor activity in people with MS.

This device, worn on the index finger, measures electromagnetic motion using four different kinds of sensors. To its advantage, it works without risking collection of random signal artifact.

With TREMBAL, the patient is hooked up to a sensor, then completes five 20-second exercises from which TREMBAL captures movement data.

If this sensor can adequately capture tremor, it can also adequately characterize it and inform treatment protocols for those with severe tremor activity. Stay tuned as the technology develops.

Do you experience tremor? How severe is it? Post your replies in the comments below or at the original “Tremors Caused by MS” forum entry.

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Note: Multiple Sclerosis News Today is strictly a news and information website about the disease. It does not provide medical advice, diagnosis, or treatment. This content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website. The opinions expressed in this column are not those of Multiple Sclerosis News Today or its parent company, BioNews Services, and are intended to spark discussion about issues pertaining to multiple sclerosis.

12 comments

  1. Melissa Vemi says:

    I’m wondering I’ve noticed that my head moves and I can’t stay perfectly still and I’m wondering if this might be a tremor? I’ve had multiple sclerosis for the last 20-plus years. I’m now secondary progressive.

    • Katrina Vesely says:

      Not DX with MS here but was assessed for years (have had most of symptoms in the past), I do have a DX of essential tremors which when it was at my worst included my arms, head, trunk, and legs. Luckily, I haven’t had any tremors in a long time like well over a year. I do take medication.

  2. Lynn Hornickel says:

    I have PPMS and have developed a tremor in my left hand which has resulted in my becoming disabled and unable to work any longer. Doctors have offered no treatment. It is very frustrating.

      • Katrina Vesely says:

        I have essential tremor diagnosis. Was assessed for MS for years, not enough evidence. When when I was first started on medication it was propanolol. It has since been increased and now Propanolol Extended release tabs. I did seem to notice more improvement with the extended release as I was only prescribed in the morning.

  3. Sharon Ferrillo says:

    I HAD A DEEP BRAIN STIMULATOR PUT IN MY BRAIN IN 2011. IT WAS NOT SUCCESSFUL . IT HELPED A LITTLE BUT I STILL SHAKE. I DRINK WITH A STRAW, CAN’T WRITE, I FIND IT HARD TO EAT IN FRONT OF PEOPLE. I WALK WITH A WALKER CAUSE I SHAKE WHEN I TRY TO WALK. I USE AN ELECTRIC TOOTHBRUSH. M Y HUSBAND COOKS DINNER, CLEANS OFF THE TABLE, LOADS AND EMPTYS DISH WASHER. MORAL OF THIS STORY IS HAVE A GREAT CARE GIVER

  4. Vicki Lowrie says:

    Like Sharon I drink with a straw, cant write, use an electric toothbrush and have so much difficulty eating that now I am forced to accept the help of others, very frustrating but fortunately all my friends know my problem and are always willing to help, far preferable to stabbing my face with a fork. And one of these friends is also my excellent caregiver and friend of 46 years. My hands are still until I intend to do something, then they shake uncontrollably. Diagosed in 1988, I have SPMS, now confined to a powered wheelchair

  5. Any kind of stress will set my body into uncontrollable tremors and can last up to an hour before calming down. Mine are resting tremors for the most part, but even a cool breeze can set them off. Often I will wake having them as well. Klonopin helps. If I sit and try to concentrate on one little item (like looking thru the mini blinds) can set my head into motion.

    • Angela Marie Mayberry says:

      Same. I’m on STD from my job as a project support specialist because the drive to work would set off symptoms. I’ve been informed that they will have to fill my position as it is too essential to keep open while I try to get the tremors under control. I’m trying CBD but don’t like the lucid dreams it causes. Any other suggestions?

  6. Stacey Guenther says:

    I have a tremor and I always thought it was my anxiety until my doctor mentioned the tremor is caused by the MS. My handwriting is nearly indecipherable and I spill food everywhere when I eat. It’s embarrassing.

  7. Betty Tuxhorn says:

    Have tremors when on computer, shaking when trying to point the mouse where it should go and handwriting indescribable

  8. Étienne Tremblay says:

    Hi, My tremor is intention. I have ppms. I also make a mess when I eat and drink, I drop things, I can’t draw anymore and my writing is a catastrophy 🙁 !

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