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Guidelines for Photic Stimulation

Methodology of photic stimulation revisited: Updated European algorithm for visual stimulation in the EEG laboratory.
Kasteleijn-Nolst Trenité, D., Rubboli, G., Hirsch, E., Martins da Silva, A., Seri, S., Wilkins, A., Parra, J., Covanis, A., Elia, M., Capovilla, G., Stephani, U. and Harding, G. (2012)
Epilepsia. 2012 January, 53: 16–24. doi: 10.1111/j.1528-1167.2011.03319.x

Intermittent photic stimulation (IPS) is a common procedure performed in the electroencephalography (EEG) laboratory in children and adults to detect abnormal epileptogenic sensitivity to flickering light (i.e., photosensitivity). In practice, substantial variability in outcome is anecdotally found due to the many different methods used per laboratory and country. We believe that standardization of procedure, based on scientific and clinical data, should permit reproducible identification and quantification of photosensitivity. We hope that the use of our new algorithm will help in standardizing the IPS procedure, which in turn may more clearly identify and assist monitoring of patients with epilepsy and photosensitivity.

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