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Progressive myoclonus epilepsy (PME) is a group of diseases characterized by myoclonus, epileptic seizures, tonic–clonic seizures, and other serious symptoms such as trouble walking or speaking. These rare disorders often get worse over time and can be fatal.
Myoclonic dystonia or Myoclonus dystonia syndrome is a rare movement disorder that induces spontaneous muscle contraction causing abnormal posture. The prevalence of myoclonus dystonia has not been reported, however, this disorder falls under the umbrella of movement disorders which affect thousands worldwide. [1]
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. [6] MERRF syndrome is also known as myoclonic epilepsy with ragged-red fibers.
MEAK is a form of progressive myoclonus epilepsy that typically begins between the ages of 3 and 15 years (the average of onset is 10 years). The first symptoms may include ataxia and myoclonus (unsteadiness and difficulty coordinating movements), along with generalized tonic-clonic ("grand mal") seizures.
Opsoclonus myoclonus syndrome (OMS), also known as opsoclonus-myoclonus-ataxia (OMA), is a rare neurological disorder of unknown cause which appears to be the result of an autoimmune process involving the nervous system. It is an extremely rare condition, affecting as few as 1 in 10,000,000 people per year.
Lance–Adams syndrome (LAS) is a sequela of hypoxic encephalopathy due to respiratory arrest, airway obstruction, cardiac arrest, etc., several days after the onset of hypoxic encephalopathy. A condition that presents with functional myoclonus associated with increased cortical excitability in a few weeks.
Ramsay Hunt syndrome type 1 is a rare, degenerative, neurological disorder characterized by myoclonus epilepsy, intention tremor, progressive ataxia and occasionally cognitive impairment [1] It has also been alternatively called dyssynergia cerebellaris myoclonica , [ 2 ] [ 3 ] dyssynergia cerebellaris progressiva , [ 4 ] dentatorubral ...
Unverricht–Lundborg disease was first known as one of two different diseases, depending on the location of the individual who had it: Baltic myoclonus or Mediterranean myoclonus. [7] The reason for the different names was partly regional but also because the prognosis of the disease was different for individuals with each due to the way that ...