Regional cerebral glucose metabolism in children with deterioration of one or more cognitive functions and continuous spike-and-wave discharges during sleep

Brain : a Journal of Neurology
P MaquetG Franck

Abstract

The Landau-Kleffner syndrome (LKS) and the syndrome of continuous spike-and-wave discharges during slow sleep (CSWS) were originally described, and are still considered, separately. The former combines an acquired aphasia with spike-and-wave discharges that are activated by slow wave sleep, behavioural disturbances, and sometimes epileptic seizures. The latter is characterized by continuous spike-and-wave discharges during slow wave sleep, usually combined with global intellectual deterioration and epileptic seizures. These two syndromes share many common features: (i) onset during childhood; (ii) deterioration of cognitive functions that were previously normally acquired; (iii) seizure type; (iv) EEG pattern; (v) pharmacological reactivity; (vi) regression of the neuropsychological symptoms, of the EEG abnormalities and of the seizures before the end of adolescence; (vii) absence of obvious structural lesion detected by CT or MRI scan. Therefore, we postulated that these patients might, in fact, be presenting several facets of a single process associating the deterioration of cognitive functions and continuous spike-and-wave discharges during slow wave sleep. The pathogenesis of this syndrome remains unknown. Seven patients, p...Continue Reading

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