There are two syndromes and several related disorders. Juvenile Juvenile<unk>  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. Progressive 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<unk>  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. Lafora disease is also known as Lafora progressive myoclonus epilepsy, which is an autosomal recessive inherited disorder involving recurrent seizures and degradation of mental capabilities. Lafora disease usually occurs in late childhood and usually leads to death around 10 years after first signs of the disease. Unverricht-Lundborg disease is an autosomal recessive inherited disorder seen in individuals as young as six years. It is associated with possible loss of consciousness, rigidity, ataxia, dysarthria, declination of mental functioning, and involuntary shaking. Neuronal ceroid lipofuscinosis is a group of diseases that cause blindness, loss of mental abilities, and loss of movement. All diseases in this group are lysosomal-storage disorders that also lead to death roughly ten years after onset of the disease. Related disorders Lennox–Gastaut syndrome is often associated with intellectual deficits as well as a lack of response to anti-epileptic drugs. It usually begins in the first years of life. Reticular reflex myoclonus is a generalized form of epilepsy originating from the brain stem. Jerks associated with the disorder can affect all muscles on the body or be selective in certain areas. Jerks can be triggered by voluntary movement or be stimulus-selective. Differential diagnosis<unk>  jerks that are not epileptic may be due to a nervous system disorder or other metabolic abnormalities that may arise in renal (e.g. hyperuraemia) and liver failure (e.g. high ammonia states).
Myoclonic epilepsy
Progressive myoclonus epilepsy
Musicogenic epilepsy
Vertiginous epilepsy
Myoclonic astatic epilepsy
Rolandic epilepsy
Photosensitive epilepsy
Childhood absence epilepsy