 Clinical features include coarse facial features, corneal clouding, hepatomegaly, skeletal dysplasia, and learning disability in addition to the myoclonus. 36.  EEG background shows low-voltage fast activity, but slowing can be seen in patients with [slideshare.net]

 The gene associated with this disease, CLN3, is located on the short arm of chromosome 16. 20. [slideshare.net]

[…] finger movement Causes * Dysarthria * Mental retardation * Truncal ataxia. [checkorphan.org]

Other features include mental retardation, dysarthria, truncal ataxia, and loss of fine finger movements. EEG shows slow dysrhythmia, multifocal and occasionally generalized epileptiform discharges. [malacards.org]

The patient presented truncal ataxia, tremor in both hands that could be increased voluntarily, dysarthria, and bilateral dysmetria (finger-to-nose test). [elsevier.es]

 Characteristically, visual seizures are the first manifestation, followed by generalized tonic–clonic seizures, absences, or drop attacks.  Visual seizures present as transient blindness, simple or complex visual hallucinations.  Myoclonus is often [slideshare.net]

Patients 1, 2, 4 and 7 had drop attacks beginning around the age of 13 or 14 years. Generalized tonic clonic seizures were documented in all except Patient 2. [academic.oup.com]

Clinical manifestations of the patients include cerebellar ataxia with myopathy, recurrent headache, and myoclonus and epilepsy.... SGCE and myoclonus dystonia: motor characteristics, diagnostic criteria and clinical predictors of genotype. [connection.ebscohost.com]

 Patients with onset before age 20 years often present with the phenotype of PME, characterised by ataxia, seizures, myoclonus, and progressive intellectual deterioration. 39.  caused by unstable expansion of CAG repeats of a gene at 12p13.31.  MRI [slideshare.net]

Girard showed slowing background with frequent generalized and multifocal epileptiform discharges in PME.[5] De Siqueira[6] found that photosensitivity with frequent interictal and ictal discharges could be seen in PME. [journals.lww.com]