Myoclonic dystonia
(Redirected from Myoclonus-dystonia)
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Myoclonic dystonia | |
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Synonyms | N/A |
Pronounce | N/A |
Specialty | N/A |
Symptoms | Myoclonus, dystonia, tremor, anxiety, depression |
Complications | N/A |
Onset | Childhood or adolescence |
Duration | Lifelong |
Types | N/A |
Causes | Genetic mutations, often in the DYT11 gene |
Risks | Family history of the condition |
Diagnosis | Clinical evaluation, genetic testing |
Differential diagnosis | Essential tremor, Parkinson's disease, Huntington's disease |
Prevention | N/A |
Treatment | Medications, deep brain stimulation, physical therapy |
Medication | N/A |
Prognosis | Variable, often manageable with treatment |
Frequency | Rare |
Deaths | N/A |
A neurological disorder characterized by myoclonic jerks and dystonia
Myoclonic dystonia is a rare neurological disorder characterized by the presence of both myoclonus and dystonia. It is a movement disorder that typically manifests in childhood or adolescence and can significantly impact the quality of life of affected individuals.
Signs and symptoms
Myoclonic dystonia is primarily characterized by rapid, involuntary muscle jerks known as myoclonus, which can affect various parts of the body. These jerks are often accompanied by dystonia, a condition that causes sustained or repetitive muscle contractions, resulting in abnormal postures or movements. The severity and distribution of symptoms can vary widely among individuals.
Causes
The exact cause of myoclonic dystonia is not fully understood, but it is believed to have a genetic component. Mutations in the SGCE gene have been associated with the disorder. The condition is often inherited in an autosomal dominant pattern, meaning that a single copy of the altered gene in each cell is sufficient to cause the disorder.
Diagnosis
Diagnosis of myoclonic dystonia is primarily clinical, based on the observation of characteristic symptoms. Neurologists may use electromyography (EMG) to assess muscle activity and genetic testing to identify mutations in the SGCE gene. Other tests may be conducted to rule out other conditions with similar presentations.
Treatment
Treatment for myoclonic dystonia is symptomatic and may include medications such as clonazepam, valproic acid, and anticholinergics to manage symptoms. In some cases, botulinum toxin injections may be used to reduce dystonic movements.
Deep brain stimulation
For individuals with severe symptoms that do not respond to medication, deep brain stimulation (DBS) may be considered. DBS involves the surgical implantation of electrodes in specific areas of the brain to modulate abnormal neural activity. This treatment has shown promise in reducing both myoclonus and dystonia in some patients.
Prognosis
The prognosis for individuals with myoclonic dystonia varies. While the condition is chronic, many patients experience a stabilization of symptoms over time. The impact on quality of life depends on the severity of symptoms and the effectiveness of treatment.
See also
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Contributors: Prab R. Tumpati, MD