title: IPS Interest in the EEG of Patients after a Single Epileptic Seizure.
abstract: 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.
authors.affiliation: Unit of Nervous and Endocrine Physiology, Laboratory of Genetics and Neuroendocrine Physiology, Department of Biology, Faculty of Sciences, Ibn Tofail University, PB 133, 14000 Kenitra, Morocco.
authors.forename: Fatima Zahra
authors.identifier: 0000-0003-2873-6565
authors.initials: FZ
authors.lastname: Taoufiqi
authors.affiliation: Neurophysiology Department, Mohamed V Teaching Military Hospital, Rabat 10100, Morocco.
authors.forename: Jamal
authors.initials: J
authors.lastname: Mounach
authors.affiliation: Neurophysiology Department, Mohamed V Teaching Military Hospital, Rabat 10100, Morocco.
authors.forename: Amal
authors.initials: A
authors.lastname: Satte
authors.affiliation: Service of Neurology, Cheikh Khalifa Hospital, Casablanca 82403, Morocco.
authors.forename: Hamid
authors.initials: H
authors.lastname: Ouhabi
authors.affiliation: Unit of Nervous and Endocrine Physiology, Laboratory of Genetics and Neuroendocrine Physiology, Department of Biology, Faculty of Sciences, Ibn Tofail University, PB 133, 14000 Kenitra, Morocco.
authors.forename: Aboubaker
authors.initials: A
authors.lastname: El Hessni