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Clin EEG Neurosci ; 37(1): 41-5, 2006 Jan.
Article in English | MEDLINE | ID: mdl-16475484

ABSTRACT

Ictal nystagmus (IN) is an uncommon phenomenon characterized by rhythmic saccadic eye movements occurring during epileptic seizures. We report a newborn baby with severe birth asphyxia, undergoing long-term video EEG monitoring with electro-oculogram (EOG), who showed irregular IN when eye movements crossed the midline from left to right and vice versa, resulting in large amplitude of the nystagmoid movements. The nystagmus was followed 15 to 29 seconds later by ictal discharges in the occipital regions. MRI of the brain showed features suggestive of periventricular leukomalacia. This interesting combination of findings suggests a complex mechanism for IN of cortical or subcortical ictal rhythms, which results in (a) the generation of subcortical electrical discharges in the pons and midbrain, causing nystagmoid eye movements, and (b) subsequent occipital spiking. We conclude that this clinical manifestation supports the existence of functioning cortical-subcortical connections between the brainstem ocular motor centers and the occipital cortex at birth.


Subject(s)
Asphyxia Neonatorum/complications , Asphyxia Neonatorum/diagnosis , Electroencephalography , Epilepsy/diagnosis , Epilepsy/etiology , Nystagmus, Congenital/diagnosis , Female , Humans , Infant, Newborn , Nystagmus, Congenital/etiology
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