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Related Experiment Videos

Persistence of photosensitivity

G F Harding1, A Edson, P M Jeavons

  • 1Department of Vision Sciences, Aston University, Birmingham, England.

Epilepsia
|June 1, 1997
PubMed
Summary

Photosensitive epilepsy often persists long-term, with at least two-thirds of patients remaining photosensitive. Valproate medication effectively controls photosensitivity in treated individuals with this neurological condition.

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Area of Science:

  • Neurology
  • Epileptology
  • Clinical Neuroscience

Background:

  • Photosensitive epilepsy is a common form of epilepsy triggered by visual stimuli.
  • Long-term follow-up studies are crucial for understanding the natural history and treatment efficacy.

Purpose of the Study:

  • To investigate the long-term persistence of photosensitivity in patients with photosensitive epilepsy.
  • To evaluate the effectiveness of valproate in managing photosensitivity.

Main Methods:

  • EEG investigation using intermittent photic stimulation (IPS) to assess photosensitivity.
  • Longitudinal follow-up of 100 patients with photosensitive epilepsy over an average of 14 years.

Main Results:

  • 77 out of 100 patients achieved seizure freedom.
  • Photosensitivity persisted in 32 untreated patients, while it disappeared in 14.
  • In treated patients, 23 no longer showed photosensitivity, and 31 still exhibited photoparoxysmal responses (PPRs).

Conclusions:

  • Photosensitivity persists in at least two-thirds of patients with photosensitive epilepsy.
  • Valproate demonstrates efficacy in controlling photosensitivity in this patient group.

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