Objectives and methods: To perform a video-polygraphic analysis of 11 cataplectic attacks in a 39-year-old narcoleptic patient,correlating clinical manifestations with polygraphic fndings. Polygraphic recordings monitored EEG, EMG activity from several cranial, trunk, upper and lower limbs muscles, eye movements, EKG, thoracic respiration.Results: Eleven attacks were recorded, all of them lasting less than 1 min and ending with the fall of the patient to the ground. We identifed, based on the video-polygraphic analysis of the episodes, 3 phases: initial phase, characterized essentially by arrest of eye movements and phasic, massive, inhibitory muscular events; falling phase, characterized by a rhythmic pattern of suppressions and enhancements of muscular activity, leading to the fall; atonic phase, characterized by complete muscle atonia. Six episodes out of 11 were associated with bradycardia, that was maximal during the atonic phase.Conclusions: Analysis of the muscular phenomena that characterize cataplectic attacks in a standing patient suggests that the cataplectic fall occurs with a pattern that might result from the interaction between neuronal networks mediating muscular atonia of REM sleep and neural structures subserving postural control.
A video-polygraphic analysis of the cataplectic attack / G., Rubboli; G., D'Orsi; A., Zaniboni; E., Gardella; M., Zamagni; R., Rizzi; Meletti, Stefano; F., Valzania; A., Tropeani; C. A., Tassinari. - In: CLINICAL NEUROPHYSIOLOGY. - ISSN 1388-2457. - STAMPA. - 111:2(2000), pp. 120-128. [10.1016/S1388-2457(00)00412-0]
A video-polygraphic analysis of the cataplectic attack
MELETTI, Stefano;
2000
Abstract
Objectives and methods: To perform a video-polygraphic analysis of 11 cataplectic attacks in a 39-year-old narcoleptic patient,correlating clinical manifestations with polygraphic fndings. Polygraphic recordings monitored EEG, EMG activity from several cranial, trunk, upper and lower limbs muscles, eye movements, EKG, thoracic respiration.Results: Eleven attacks were recorded, all of them lasting less than 1 min and ending with the fall of the patient to the ground. We identifed, based on the video-polygraphic analysis of the episodes, 3 phases: initial phase, characterized essentially by arrest of eye movements and phasic, massive, inhibitory muscular events; falling phase, characterized by a rhythmic pattern of suppressions and enhancements of muscular activity, leading to the fall; atonic phase, characterized by complete muscle atonia. Six episodes out of 11 were associated with bradycardia, that was maximal during the atonic phase.Conclusions: Analysis of the muscular phenomena that characterize cataplectic attacks in a standing patient suggests that the cataplectic fall occurs with a pattern that might result from the interaction between neuronal networks mediating muscular atonia of REM sleep and neural structures subserving postural control.File | Dimensione | Formato | |
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