Progressive myoclonic epilepsies (PME) are a group of more than 10 rare types of epilepsy that are “progressive.” People with PME have a decline in motor skills, balance and cognitive function over time.
Myoclonus indicates frequent muscle jerks, both spontaneous and often stimulus induced.
In addition to myoclonic jerks, convulsive seizures may also occur.
Both sexes are affected equally.
Children or young adults are normal until the seizures start. The seizures usually start between 6 and 16 years of age.
Seizures can mimic other epilepsy syndromes at first. The background slowing on an EEG should make the physician concerned for PME.
