Do you suddenly start to shake your hand when you bring a cup of coffee to your mouth, when you pick up a pen to sign a document, or when you try to button your shirt? Does this tremor seem to increase as you get closer to what you are about to do, that is, the goal? This is something that scares and worries many people. This is not a normal tremor. Today, we will talk about this specific condition, which is known in medical science as
Intention Tremor .
Simply put, what is Intention Tremor?
Intention Tremor is an involuntary muscle tremor. But it is not just any tremor.
It occurs only when you are trying to do something with a purpose or goal. This tremor does not occur when you are just standing still. Another feature of this is that the tremor increases as your hand or leg gets closer to the target. Imagine that you are trying to touch your nose with your finger. As your finger gets closer to your nose, the tremor becomes severe and your hand starts to swing back and forth in a zigzag pattern. This can affect the hands, legs, and sometimes the muscles that help you speak. Then the voice sounds like it is trembling. Doctors also call this condition 'Cerebellar Tremor'. The reason for this is that this condition is directly related to damage to the 'cerebellum' or the part of our brain called
the cerebellum . The Cerebellum is the main center that coordinates our movements.
Are there other symptoms that come with Intention Tremor?
Yes. When the cerebellum is damaged, not only tremors but also other neurological symptoms may appear. Because the cerebellum is very important for the coordination of movements in our body. Let's explain this more in the table below.
| Symptom | A Simple Explanation |
|---|
| Nystagmus | Rapid, uncontrolled movement of the eyes from side to side or up and down. |
| Dysmetria | Unable to accurately gauge the distance when reaching for an object. Either stops close or goes far away. |
| Dysdiadochokinesia | Inability to perform rapid, sequential movements (e.g., moving the hand up and down quickly). |
| Hypotonia | Decreased general muscle tone. Limbs feel loose. |
| Proprioception deficits | Not being able to know exactly where your arm or leg is when your eyes are closed. |
| Gait ataxia | Staggering from side to side while walking. You tend to walk with your feet spread wide due to lack of balance. |
What causes this shaking?
As we mentioned earlier, the primary cause of this is damage to the cerebellum part of the brain. There are various medical conditions and other causes that can cause this damage.
The important thing is that Intention Tremor is not a disease, but a symptom of another underlying condition.
Here are some of the main reasons:
- Multiple Sclerosis (MS): This is the most common cause of Intention Tremor. It is an autoimmune disease.
- Stroke: The cerebellum can be damaged by a blockage or rupture of a blood vessel that supplies blood to the brain.
- Traumatic Brain Injury (TBI): An impact to the head, especially the back of the head, from an accident.
- Brain Tumors: Tumors that form in or around the cerebellum.
- Alcohol use disorder: Excessive alcohol consumption over a long period of time can cause permanent damage to the cerebellum.
- Wilson Disease: A genetic disease caused by the accumulation of copper in the body.
- Spinocerebellar ataxia, ataxia-telangiectasia, and Friedreich's ataxia: These are inherited genetic conditions that affect motor coordination.
- Certain medications: Some medications, especially those for diseases such as epilepsy, can cause this condition as a side effect.
- Mercury poisoning.
What are the treatments for this?
Treatment for Intention Tremor involves finding the underlying cause. For example, if your doctor determines that a medication is causing your tremor, they may recommend stopping the medication or switching to a different medication. Some conditions, like MS, cannot be cured completely. However, there are treatments that can help control the severity of the tremor and make it easier to perform daily activities.
- Physical therapy: A physical therapist helps you improve your body's movement and balance. This includes exercises that strengthen muscles and teach you how to walk.
- Occupational therapy: An occupational therapist can teach you how to do everyday tasks (like eating and getting dressed) with your tremor more easily. This can include using wrist or ankle weights and relaxation techniques.
- Medications: Medications are usually prescribed for Intention Tremor caused by MS.
- Surgery: In some severe cases, especially for MS patients, a brain surgery called Thalamic deep brain stimulation can help reduce tremors.
When should I see a doctor?
This is a very important question.
If you have recently started experiencing tremors in your limbs or voice, please do not ignore it. Intention Tremor can be a symptom of a serious underlying condition, so it is important to see a doctor as soon as possible to get a proper diagnosis.
If a doctor has already told you that you have Intention Tremor, seek medical advice again in the following cases:
| Talk to your doctor... |
|---|
| If the tremor increases over time. |
| If your tremors make it difficult to perform your daily activities . |
| If you feel stressed or anxious because of this situation. |
| New neurological symptoms in addition to tremors(e.g., changes in thinking, muscle weakness) if any. |
What is the difference between Essential Tremor and Intention Tremor?
Many people confuse the two.
Essential Tremor is the most common type of tremor. It also causes tremors in both hands when performing an action. However, it is not usually accompanied by the other neurological symptoms we discussed earlier (balance problems, eye movements).
Intention Tremor is
a specific subtype of action tremor. In this tremor, the tremor increases as the target is approached, and other neurological symptoms may also occur due to a problem in the cerebellum.
Does this kind of tremor also occur in Parkinson's disease?
Intention tremor can occur with Parkinson's disease, but it is
very rare. The main symptom of Parkinson's disease is
resting tremor . This is when your arm or leg shakes when you are at rest (for example, when you are sitting in a chair with your hand on your lap). Intention tremor is the opposite of this, a tremor that occurs when you are doing something (action tremor).
Take-Home Message
- Intention Tremor is a tremor that increases when you are trying to do something with intention, especially when you are getting closer to your goal. The main cause of this is damage to the Cerebellum part of the brain.
- This is not just a tremor. It can also be accompanied by other neurological symptoms, such as balance problems and abnormal eye movements.
- Multiple Sclerosis (MS) is the main cause of this. In addition, it can be caused by stroke, head injuries, and other medical conditions.
- If you have new or worsening tremors, don't ignore them. Be sure to see your doctor for a proper diagnosis.
- Treatment depends on the underlying cause. Physical therapy and occupational therapy can be of great help in making daily life easier.
intention tremor, tremor, hand tremor, cerebellum, multiple sclerosis, neurological diseases
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