Dyspraxia of Speech and of Eye Motility
- 1 January 1980
- journal article
- research article
- Published by Taylor & Francis in Acta Oto-Laryngologica
- Vol. 89 (1-2) , 144-151
- https://doi.org/10.3109/00016488009127120
Abstract
Five patients with a disturbance of their preprogramming of speech (dyspraxia of speech) were exposed to a comprehensive eye-motor test-battery. The saccades were found hypometric and inaccurate with irregular intervening pauses. The finding was interpreted as due to an extension of lesions from frontal cortical speech areas into visual motor cortex disturbing the normal preprogramming of voluntary saccades. The results were interpreted as supporting the assumption that voluntary saccades are initiated in the frontal cortex. An increase of vestibular nystagmus in these cases was related to a release of vestibular nystagmus due to the disappearance of cortical inhibition on brain stem activity. Zusammenfassung Fünf Patienten mit Sprechprogrammierungsstörungen loraler, verbaler Dyspraxie) wurden mit einer umfass-enden Serie von Prüfungen der Augenmotorik unter-sucht. Es ergaben sich hypometrische und ungenaue Saccaden rait unregelmäβigen zwischenliegenden Pausen. Die Befunde deuten auf eine Ausbreitung der cortikalen Läsionen vom frontalen Abschnitt für Sprache bis zum motorischen Cortex für Augenmotorik mit daraus resultierenden Störungen der Vorprogrammierung von willkürlichen Saccaden. Diese Resultate bestätigen die Annahme, daβ willkürliche Saccaden in der Rinde des Stirnlappens ausgelöst werden. Eine Vermehrung des vestibularen Nystagmus in den beschriebenen Fällen steht im Zusammenhang mit einer Enthemmung auf Grund eines Wegfalles der cortikalen Inhibition auf die Aktivität des Hirnstammes.This publication has 12 references indexed in Scilit:
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