Epilepsia partialis continua
| Epilepsia partialis continua | |
|---|---|
| Classification and external resources | |
| Specialty | neurology |
| ICD-10 | G40.5 |
| ICD-9-CM | 345.7 |
| eMedicine | neuro/653 |
| MeSH | D017036 |
Epilepsia partialis continua (also called Kojevnikov's or Kozhevnikov's epilepsia) is a rare type of brain disorder in which a patient experiences recurrent motor epileptic seizures that are focal (hands and face), and recur every few seconds or minutes for extended periods (days or years).
During these seizures, there is repetitive focal myoclonus or Jacksonian march. After a seizure has subsided, Todd's phenomenon may be observed, which includes weakness.
There are numerous causes for this kind of seizure and they differ depending somewhat on the age at which the seizures begin. Epilepsy most often occurs at the extremes of life – in childhood or in very old age – but can develop at any time throughout one's life.
Although these seizures are usually due to large, acute brain lesions resulting from strokes in adults and processes in children (Rasmussen's encephalitis), possibly caused by chronic viral infections, edema, or autoimmune processes.
They are very medication and therapy-resistant, and the primary therapeutic goal is to stop secondary generalization. There are also many other reasons why these seizures occur. For example, they could be due to genetics, infections, or problems with brain development. Commonly the cause is unknown.
Genetic background determines such features as height, eye color, and potential to develop certain diseases like diabetes, but it also determines all the chemicals and structures that make up the brain, therefore playing a role in epilepsia partialis continua. The chemicals and structures that make up the brain have similarities across different people, but they vary in certain enzymes and receptors. These variations are not usually enough to cause a problem, but occasionally they do. For example, if a person has a mutation in a gene that creates the sodium channel (a part of the neuron required for firing) it makes it easier for neuronal firing to get out of control.
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