IPS Interest in the EEG of Patients after a Single Epileptic Seizure

• Published in: Neuroscience journal Vol. 2016; pp. 5050278 - 6
• Main Authors: Taoufiqi, Fatima Zahra, Mounach, Jamal, Satte, Amal, Ouhabi, Hamid, El Hessni, Aboubaker
• Format: Journal Article
• Language: English
• Published: United States Hindawi Publishing Corporation 01.01.2016
• ISSN: 2314-4262; 2314-4270
• DOI: 10.1155/2016/5050278

Objective. This study aims to evaluate the incidence of pathological cerebral activity responses to intermittent rhythmic photic stimulation (IPS) after a single epileptic seizure. Patients and Methods. One hundred and thirty-seven EEGs were performed at the Neurophysiology Department of Mohamed V Teaching Military Hospital in Rabat. Clinical and EEG data was collected. Results. 9.5% of our patients had photoparoxysmal discharges (PPD). Incidence was higher in males than in females, but p value was not significant ( p = 0.34 ), and it was higher in children compared to adults with significant p value ( p = 0.08 ). The most epileptogenic frequencies were within the range 15–20 Hz. 63 patients had an EEG after 72 hours; among them 11 were photosensitive ( p = 0.001 ). The frequency of the PPR was significantly higher in patients with generalized abnormalities than in focal abnormalities ( p = 0.001 ). EEG confirmed a genetic generalized epilepsy in 8 cases among 13 photosensitive patients. Conclusion. PPR is age related. The frequencies within the range 15–20 Hz should inevitably be included in EEG protocols. The presence of PPR after a first seizure is probably more in favor of generalized seizure rather than the other type of seizure. PPR seems independent from the delay Seizure-EEG. Our study did not show an association between sex and photosensitivity.