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Epilepsy and photosensitivity.

H Aziz, P Francis, S M Ali

    JPMA. the Journal of the Pakistan Medical Association
    |August 1, 1989
    PubMed
    Summary
    This summary is machine-generated.

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    Photosensitive epilepsy affects 3.9% of epilepsy cases, often triggered by screens. Early onset is common, with a male predominance in younger children, and a family history is noted in some patients.

    Area of Science:

    • Neurology
    • Epileptology

    Background:

    • Photosensitive epilepsy (PSE) is a subtype of epilepsy triggered by visual stimuli.
    • Understanding the prevalence and characteristics of PSE is crucial for diagnosis and management.

    Purpose of the Study:

    • To determine the prevalence of photosensitive epilepsy in a large cohort.
    • To investigate the demographic, clinical, and electrophysiological features of photosensitive epilepsy.
    • To identify common triggers and seizure types in patients with PSE.

    Main Methods:

    • Retrospective analysis of 2053 epilepsy cases.
    • Data collection included patient demographics, seizure history, trigger identification, and electroencephalogram (EEG) findings.
    • Statistical analysis was performed to identify significant trends and correlations.

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    Main Results:

    • 3.9% of the studied epilepsy cases exhibited photosensitive epilepsy.
    • The mean age of onset was 14.9 years for males and 11.8 years for females, with a male preponderance in the 6-10 year age group.
    • Television (48.2%) and light stimuli (7.4%) were the most common triggers. Primary generalized tonic-clonic seizures occurred in 44.4% of cases.
    • EEG was normal in 60% of cases; 18.8% showed nonspecific dysrhythmias, and 2.1% had interictal spike-and-sharp wave complexes.
    • A family history of photosensitive epilepsy was reported in 14.1% of cases.

    Conclusions:

    • Photosensitive epilepsy is a relevant subtype with specific demographic and clinical features.
    • Visual stimuli, particularly television, are significant triggers.
    • While EEG can be abnormal, a normal EEG does not exclude photosensitive epilepsy, highlighting the importance of clinical history.