Myoclonic seizures

What is Myoclonic seizures?

Myoclonus or is a brief, involuntary twitching of a muscle or a group of muscles. It describes a medical sign and, generally, is not a diagnosis of a disease. These myoclonic twitches, jerks, or seizures are usually caused by sudden muscle contractions (positive myoclonus) or brief lapses of contraction (negative myoclonus). The most common circumstance under which they occur is while falling asleep (hypnic jerk). Myoclonic jerks are a sign of various neurological disorders. Hiccups are a kind of myoclonic jerk specifically affecting the diaphragm. When a spasm is caused by another person it is known as a "provoked spasm". Shuddering attacks in babies fall in this category.

Myoclonic jerks may occur alone or in sequence, in a pattern or without pattern. They may occur infrequently or many times each minute. Most often, myoclonus is one of several signs in a wide variety of nervous system disorders such as multiple sclerosis, Parkinson's disease, Alzheimer's disease, subacute sclerosing panencephalitis, Creutzfeldt-Jakob disease (CJD), serotonin toxicity, some cases of Huntington's disease, some forms of epilepsy, and occasionally in intracranial hypotension. Some researchers indicate that jerks persistently may even cause early tremors.

In almost all instances in which myoclonus is caused by central nervous system disease it is preceded by other symptoms; for instance, in CJD it is generally a late-stage clinical feature that appears after the patient has already started to exhibit gross neurological deficits.

Anatomically, myoclonus may originate from lesions of the cortex, subcortex or spinal cord. The presence of myoclonus above the foramen magnum effectively excludes spinal myoclonus; further localisation relies on further investigation with electromyography (EMG) and electroencephalography (EEG).

Questions and answers on "Myoclonic seizures"

My 3y 7m old sun is suffering from myoclonic jerks from last 3 years. We had taken treatments from many Dr. But the result was same. Now we are...

doctor1 MD

you should use valproate for treatment. beacause valproate is the drug of choice in myoclonic jerks. consult a neurophysician before startng therapy.

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A person was affected by shingles two years back and treated. Is there any chance his partner can get transmitted with shingles and develop...

doctor1 MD

Brief Answer:
There is little chance of transmission.

Detailed Answer:

Thank you for posting your query.

There is little chance of transmission...

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My 4yr old has been having whats believed to be myoclonic jerks for approx 3 (nearly 4 mths) recently she has been getting pins and needles in both...

doctor1 MD

Brief Answer:
More investigation CT and MRI

Detailed Answer:
Thanks for your question.

Sudden appearance of myoclonic jerks is concerning. Based...

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