Abstract:
:Photoparoxysmal response (PPR) is sometimes incidentally encountered in EEGs performed for evaluation of nonepileptic symptoms. We conducted the first long-term study of a cohort of nonepileptic patients to determine their risk of having seizures subsequent to incidental recording of PPR. After 6 to 12 years (mean, 9 years), none of the 33 patients had had epileptic seizures. To identify prognostic factors associated with PPR, we performed a case-control study comparing the cohort with 33 age-matched patients who had had epileptic seizures prior to PPR recording. There was no statistically significant difference between the two groups with respect to the clinical or EEG data. Morphology of the PPR discharge was not different between the two groups. Contrary to what is widely believed, persistence of PPR discharges beyond stimulation was not associated with a high risk of developing seizures. Prognosis of PPR is age-dependent and seems favorable in adults without previous epileptic seizures.
journal_name
Neurologyjournal_title
Neurologyauthors
So EL,Ruggles KH,Ahmann PA,Olson KAdoi
10.1212/wnl.43.9.1719subject
Has Abstractpub_date
1993-09-01 00:00:00pages
1719-22issue
9eissn
0028-3878issn
1526-632Xjournal_volume
43pub_type
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