Absence seizures effects on reading revealed by video-electroencephalography

Objective. The effects of absence seizures on, reading have not been studie d. The purpose of this paper is to show some alterations in reading during absence seizures in, patients with video-electroencephalographic recordings . Methods. Patients were selected if absences seizures were the only type o f seizures. They were studied at rest with eyes closed and while reading al oud a text by simultaneous bipolar electroencephalographic anal video recor dings. Results. Eight patients were studied with 34 events. Absences ranged from 1-12 events in twenty-five minutes recording, seizures duration range d from 1.5-16 seconds. Brief seizures results on non-stop reading, but read ing arrest with latency of 1-3 seconds after seizure onset were present in the longer events. Post-absence amnesia ranged from 1-4.5 seconds. Re-start reading occurs mainly in, other reading place in the text, but two patient s in, one event re-started reading in the right place. Classic symptoms dur ing absence were present and reading alterations found were: reading arrest lost of reading point, bradylexia, dysprosodic reading, grapheme substitut ion, reading loudness reduction, repeating of phrases. Events occurred with out patient seizure awareness, except in, one patient by means of the time lost between onset to the end of the event. Conclusions. This study showed that acute reading alterations during absence seizures are frequent in long er seizures, producing many neuropsychological symptoms that alter reading without seizure awareness.