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Muscle tremors are unintentional trembling or shaking movements in one or more parts of the body. They can happen at any age, but are more common in older people. Muscle contractions cause twisting and repetitive motions or abnormal postures, such as twisting of the neck. There are several types of tremors, including action tremors, which occur during the movement of the affected body part, and resting tremors, which occur when a body part is at rest.
| Characteristics | Values |
|---|---|
| Definition | Unintentional trembling or shaking movements in one or more parts of the body |
| Types | Action tremor, postural tremor, isometric tremor, orthostatic tremor, physiologic tremor, essential tremor |
| Causes | Reaction to certain medications, alcohol withdrawal, or a neurological condition |
| Symptoms | Shaking, unsteadiness, or unbalance |
| Treatment | Eliminating the cause, medication, or surgery |
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What You'll Learn
- Types of tremors: essential, action, postural, isometric, orthostatic, and physiologic
- Causes: reaction to something, or a movement disorder
- Treatment: eliminating the cause
- Diagnosis: a doctor can listen to muscle activity with a stethoscope
- Progression: an essential tremor may not progress, or it may progress slowly over a few years
Types of tremors: essential, action, postural, isometric, orthostatic, and physiologic
Tremors are unintentional trembling or shaking movements in one or more parts of the body. There are several types of tremors, including essential, action, postural, isometric, orthostatic, and physiologic tremors.
Action tremors occur when you voluntarily contract the muscles in an affected body part. For example, if you lift your arm and it starts shaking, that is an action tremor. Action tremors can also be caused by underlying disorders such as dystonia or essential tremor.
Postural tremors occur when you hold a body part in a position against gravity, such as holding your arms out in front of you. They can also occur due to Parkinson's disease, certain drugs, or a neurological disorder called essential tremor.
Isometric tremors occur when you voluntarily contract a muscle but do not otherwise move your muscle or limb, such as when you make a fist. They can also be caused by pushing against a wall or holding a heavy object.
Orthostatic tremors are a rare disorder characterised by rapid muscle contractions in the legs that occur when a person stands up. The tremor usually stops when the person sits down or walks. Standing may make the person feel unsteady or unbalanced.
Physiologic tremors are a normal physical response that occurs in all individuals. They affect the hands and fingers but are not typically noticeable to the naked eye. They occur at a frequency of 8 to 12 Hz in the hands and as slow as 6.5 Hz in other body parts during maintenance of a posture. Physiologic tremors can be increased by emotions such as anxiety, stress, or fear, by exercise, fatigue, hypoglycaemia, hypothermia, hyperthyroidism, and alcohol withdrawal.
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Causes: reaction to something, or a movement disorder
Tremors are unintentional trembling or shaking movements in one or more parts of the body. They can be caused by a reaction to something, such as a physiologic tremor, which is a normal physical response that occurs in all individuals. Physiologic tremors affect the hands and fingers and are usually not noticeable to the naked eye. However, they can become more noticeable when caused by a reaction to something, such as stress or caffeine. Orthostatic tremors are another type of tremor that occurs in the legs when a person stands up. They are characterised by rapid muscle contractions, which can cause a person to feel unsteady or unbalanced. These tremors are often not visible to the naked eye and can be felt by touching the person's thighs or calves.
Tremors can also be caused by movement disorders, such as essential tremors, which are the most common type. Essential tremors are usually postural or intention tremors, affecting both sides of the body. They can be mild and not progress, or they may slowly progress over a few years. Action tremors occur when you voluntarily contract the muscles in the affected body part, such as when you lift your arm and it starts shaking. Isometric tremors occur when you voluntarily contract a muscle but don't otherwise move your muscle or limb, such as when you make a fist. While essential tremors were not traditionally associated with any disease processes, tremors can sometimes indicate a serious disorder.
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Treatment: eliminating the cause
Tremors are unintentional trembling or shaking movements in one or more parts of the body. They can be caused by muscular atrophy, which is the decrease in size and wasting of muscle tissue. Muscles that lose their nerve supply can atrophy and waste away.
If you are experiencing muscle tremors, it is important to identify the cause and address it. This may involve reducing stress, fatigue, anger, fear, caffeine intake, and smoking, as these factors can make tremors worse. If the tremors are caused by muscular atrophy, treatment may focus on restoring nerve supply to the affected muscles and preventing further wasting of muscle tissue. This could include physical therapy, nerve stimulation, or other medical interventions.
If the tremors are caused by a specific action or task, such as holding a position against gravity or performing a skilled movement, addressing the underlying cause may involve practising these movements with a therapist or making adjustments to your environment or routine to minimise the impact of the tremors.
For example, if you experience tremors when writing by hand, switching to a computer or using a writing aid may help. If tremors occur when holding your arm or leg outstretched, you may benefit from using a support or brace to reduce the impact of gravity.
Identifying and addressing any underlying medical conditions that may be causing the tremors is also crucial. Essential tremor is the most common type of tremor, and it can be treated with medication or surgery in some cases. Dystonic tremors, which occur irregularly, may also require specific treatment approaches. Consulting a healthcare professional is essential to receive an accurate diagnosis and develop an effective treatment plan.
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Diagnosis: a doctor can listen to muscle activity with a stethoscope
Tremors are unintentional trembling or shaking movements in one or more parts of the body. They can happen at any age, but are more common in older people. Everyone has some tremor when they move their hands. Stress, fatigue, anger, fear, caffeine, and smoking may make this type of tremor worse. A tremor that does not go away over time may be a sign of a medical problem and should be checked by your doctor.
There are several types of tremors, including:
- Action tremors, which occur during movement of the affected body part. These can be further divided into postural tremors, intention tremors, task-specific tremors, kinetic tremors, isometric tremors, and resting tremors.
- Dystonic tremors, which occur irregularly and cause twisting and repetitive motions or abnormal postures, such as twisting of the neck.
- Essential tremors, which are the most common type of tremor and involve small, rapid movements.
A doctor can diagnose a tremor by listening to muscle activity with a stethoscope. This can help to identify the type of tremor and determine the underlying cause. For example, a resting tremor may be diagnosed by listening to the muscle activity while the patient is resting their arm on a flat surface. An action tremor, on the other hand, would be diagnosed by listening to the muscle activity during voluntary contraction of the muscles in the affected body part.
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Progression: an essential tremor may not progress, or it may progress slowly over a few years
Tremors are unintentional trembling or shaking movements in one or more parts of the body. They are usually grouped by their appearance and cause. An essential tremor is the most common type of movement disorder. It may be mild and not progress, or it may progress slowly over the course of a few years. It typically starts as a bilateral tremor, which means it affects both sides of the body. Essential tremors weren't traditionally thought to be associated with any disease processes.
There are several types of tremors. An isometric tremor occurs when you voluntarily contract a muscle but don't otherwise move your muscle or limb, such as when you make a fist. An action tremor happens when you're voluntarily contracting muscles in the affected body part, for example, if you lift your arm and it starts shaking. A postural tremor happens when you're holding a body part in a position against gravity, like holding your arms out in front of you. An orthostatic tremor usually occurs in the legs and is a rapid, rhythmic muscle contraction that occurs immediately after you stand. This tremor is often perceived as unsteadiness. A physiologic tremor affects the hands and fingers but isn't typically noticeable to the naked eye. It's a normal physical response that occurs in all individuals.
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Frequently asked questions
Muscle tremors are unintentional trembling or shaking movements in one or more parts of the body.
Muscle contractions cause twisting and repetitive motions or abnormal postures, such as twisting of the neck.
There are several types of muscle tremors, including:
- Resting tremors
- Action tremors
- Dystonic tremors
- Postural tremors
- Intention tremors
- Task-specific tremors
- Kinetic tremors
- Isometric tremors
Muscle tremors can happen at any age and are more common in older people. However, if you experience persistent tremors that do not go away over time, it is recommended to consult a healthcare professional as it may be a sign of an underlying medical condition.
