EEG evaluation of fixation-off sensitivity in eyelid myoclonia with absences.
A 14-year-old female of moderately retarded intelligence exhibited frequent seizures of eyelid myoclonia with absences. Video-electroencephalographic recording revealed that slow eye closure was followed by eyelid myoclonia with absence seizures and that paroxysmal burst activities in the occipital region always preceded generalized spike-wave discharges. Paroxysmal burst activities were induced not only by slow eye closure but also by fixation-off, wearing Frenzel glasses. We speculate that the sensitivity to fixation-off in the occipital lobe is one of the triggering mechanisms in eyelid myoclonia with absences.
Ogura
Kaeko
K
Department of Child Neurology, Institute of Neurological Sciences, Faculty of Medicine, Tottori University, Tottori, Japan.
Maegaki
Yoshihiro
Y
Koeda
Tatsuya
T
D000293:Adolescent; D004569:Electroencephalography; D004831:Epilepsies, Myoclonic / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology*; D005143:Eyelids; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D009778:Occipital Lobe / Q000503:physiopathology*; D010775:Photic Stimulation