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Photosensitive epilepsy (PSE) is a form of epilepsy in which seizures are triggered by visual stimuli that form patterns in time or space, such as flashing lights, bold, regular patterns, or regular moving patterns.

Why does strobe lighting trigger seizures in photosensitive epilepsy?

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Pulsating visual stimuli can cause steady state visually evoked potentials, that is, brain oscillations with a frequency matching the visual stimulation: en.wikipedia.org/wiki/Steady_state_visually_evoked_potential. I would guess that these evoked oscillations are the cause for the seizure. –  H.Muster Sep 16 '13 at 6:02
@H.Muster: I think you are right. I think that epilepsy can be described as strong coupling of oscillations across large portions of the brain, and these may be triggered by oscillatory stimuli. –  Ana Sep 16 '13 at 10:11

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