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Myoclonic epilepsy
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Myoclonic epilepsy
Myoclonic epilepsy refers to a family of epilepsies that present with myoclonus. When myoclonic jerks are occasionally associated with abnormal brain wave activity, it can be categorized as myoclonic seizure. If the abnormal brain wave activity is persistent and results from ongoing seizures, then a diagnosis of myoclonic epilepsy may be considered.
Familial adult myoclonus Epilepsy (FAME) This is a condition characterized by the repetition of non-coding sequences and has been identified using various abbreviations. Initially, it was associated with four primary gene locations: FAME1 (8q23.3–q24.1), FAME2 (2p11.1–q12.1), FAME3 (5p15.31–p15.1), and FAME4 (3q26.32–3q28). Currently, it is understood that the genetic mechanism behind FAME involves the elongation of similar non-coding sequences, specifically pentanucleotide repeats, namely TTTCA and TTTTA, within different genes.
Myoclonus can be described as brief jerks of the body; it can involve any part of the body, but it is mostly seen in limbs or facial muscles. The jerks are usually involuntary and can lead to falls. EEG is used to read brain wave activity. Spike activity produced from the brain is usually correlated with brief jerks seen on EMG or excessive muscle artifact. They usually occur without detectable loss of consciousness and may be generalized, regional or focal on the EEG tracing. Myoclonus jerks can be epileptic or not epileptic. Epileptic myoclonus is an elementary electroclinical manifestation of epilepsy involving descending neurons, whose spatial (spread) or temporal (self-sustained repetition) amplification can trigger overt epileptic activity.
There are two syndromes and several related disorders.
Juvenile myoclonic epilepsy is responsible for 7% of cases of epilepsy. Seizures usually begin around puberty and usually have a genetic basis. Seizures can be stimulus-selective, with flashing lights being one of the most common triggers.
Juvenile myoclonic epilepsy (JME) is a prevalent and typical form of idiopathic generalized epilepsy (IGE) syndrome. However, establishing a precise definition for JME has posed difficulties, making it equally challenging to establish clear indicators for predicting its course and results. None of the existing systems for classifying epilepsy prioritize forecasting or final results.
Progressive myoclonus epilepsy is a disease associated with myoclonus, epileptic seizures, and other problems with walking or speaking. These symptoms often worsen over time and can be fatal.
MERRF syndrome is also known as myoclonic epilepsy with ragged-red fibers. This rare inherited disorder affects muscles cells. Features of MERRF, along with myoclonus epilepsy seizures, include ataxia, peripheral neuropathy, and dementia.
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Myoclonic epilepsy
Myoclonic epilepsy refers to a family of epilepsies that present with myoclonus. When myoclonic jerks are occasionally associated with abnormal brain wave activity, it can be categorized as myoclonic seizure. If the abnormal brain wave activity is persistent and results from ongoing seizures, then a diagnosis of myoclonic epilepsy may be considered.
Familial adult myoclonus Epilepsy (FAME) This is a condition characterized by the repetition of non-coding sequences and has been identified using various abbreviations. Initially, it was associated with four primary gene locations: FAME1 (8q23.3–q24.1), FAME2 (2p11.1–q12.1), FAME3 (5p15.31–p15.1), and FAME4 (3q26.32–3q28). Currently, it is understood that the genetic mechanism behind FAME involves the elongation of similar non-coding sequences, specifically pentanucleotide repeats, namely TTTCA and TTTTA, within different genes.
Myoclonus can be described as brief jerks of the body; it can involve any part of the body, but it is mostly seen in limbs or facial muscles. The jerks are usually involuntary and can lead to falls. EEG is used to read brain wave activity. Spike activity produced from the brain is usually correlated with brief jerks seen on EMG or excessive muscle artifact. They usually occur without detectable loss of consciousness and may be generalized, regional or focal on the EEG tracing. Myoclonus jerks can be epileptic or not epileptic. Epileptic myoclonus is an elementary electroclinical manifestation of epilepsy involving descending neurons, whose spatial (spread) or temporal (self-sustained repetition) amplification can trigger overt epileptic activity.
There are two syndromes and several related disorders.
Juvenile myoclonic epilepsy is responsible for 7% of cases of epilepsy. Seizures usually begin around puberty and usually have a genetic basis. Seizures can be stimulus-selective, with flashing lights being one of the most common triggers.
Juvenile myoclonic epilepsy (JME) is a prevalent and typical form of idiopathic generalized epilepsy (IGE) syndrome. However, establishing a precise definition for JME has posed difficulties, making it equally challenging to establish clear indicators for predicting its course and results. None of the existing systems for classifying epilepsy prioritize forecasting or final results.
Progressive myoclonus epilepsy is a disease associated with myoclonus, epileptic seizures, and other problems with walking or speaking. These symptoms often worsen over time and can be fatal.
MERRF syndrome is also known as myoclonic epilepsy with ragged-red fibers. This rare inherited disorder affects muscles cells. Features of MERRF, along with myoclonus epilepsy seizures, include ataxia, peripheral neuropathy, and dementia.