Effects of subthalamic nucleus deep brain stimulation and l-dopa on blinking in Parkinson's disease

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• 作者：Matteo Bologna^a ; Alfonso Fasano^a ; Nicola Modugno^a ; Giovanni Fabbrini^a ; ^b ; Alfredo Berardelli^a ; ^b ; ^{alfredo.berardelli@uniroma1.it}
• 关键词：ANOVA ; analysis of variance ; DBS ; deep brain stimulation ; ISI ; interstimulus interval ; LEDD ; l-dopa daily dose equivalent ; PD ; Parkinson's disease ; SEM ; standard error of the mean ; STN ; subthalamic nucleus ; UPDRS ; unified Parkinson's disease rating scale
• 刊名：Experimental Neurology
• 出版年：2012
• 期刊代码：78_00144886
• 类别：neu
• 出版时间：May, 2012
• 卷：235
• 期：1
• 页码：265-272
• 文件大小：389 K

摘要

In this study we asked whether subthalamic nucleus deep brain stimulation (STN-DBS) alone, or in combination with l-dopa, modifies voluntary, spontaneous and reflex blinking in patients with Parkinson's disease (PD). Sixteen PD patients who underwent STN-DBS were studied in four experimental conditions: without STN-DBS and without l-dopa, STN-DBS alone, l-dopa alone and STN-DBS plus l-dopa. The results were compared with those obtained in 15 healthy controls. Voluntary blinking was assessed by asking participants to blink as fast as possible; spontaneous blinking was recorded during two 60 s rest periods; reflex blinking was evoked by electrical stimulation of the supraorbital nerve. Blinking were recorded and analysed with the SMART motion system. STN-DBS increased the peak velocity and amplitude for both the closing and opening voluntary blink phases, but prolonged the inter-phase pause duration. l-dopa had no effects on voluntary blinking but reversed the increased inter-phase pause duration seen during STN-DBS. Spontaneous blink rate increased after either STN-DBS or l-dopa. Reflex blinking kinematics were not modified by STN-DBS or l-dopa. The STN-DBS effects on voluntary blinking kinematics and spontaneous blinking rate may occur as results of changes of cortico-basal ganglia activity. The prolonged pause duration of voluntary blinking indicates that STN-DBS has detrimental effects on the cranial region. These results also shed light on the pathophysiology of eyelids opening apraxia following STN-DBS.