Sleep bruxism is related to decreased inhibitory control of trigeminal motoneurons, but not with reticulobulbar system

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• 作者：Rahşan İnan ; Gülçin Benbir Şenel ; Figen Yavlal ; Derya Karadeniz…
• 关键词：Bruxism ; Masseter inhibitory reflex ; Auditory startle reaction ; Brainstem excitability
• 刊名：Neurological Sciences
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：38
• 期：1
• 页码：75-81
• 全文大小：
• 刊物类别：Medicine
• 刊物主题：Neurology; Neuroradiology; Neurosurgery; Psychiatry;
• 出版者：Springer Milan
• ISSN：1590-3478
• 卷排序：38

文摘

Sleep bruxism (SB) is a stereotyped movement disorder characterized by grinding or clenching of the teeth during sleep. We aimed to understand the abnormal networks related to the excitability of masticatory pathways in patients with SB. Eleven patients with SB and age- and gender-matched 20 healthy subjects were prospectively enrolled in our study. The masseter inhibitory reflex (MIR) after electrical stimulation and auditory startle reaction (ASR) were examined. For MIR responses, durations of early and late silent period (SP) were shorter and the degree of suppression of SPs was significantly lower in SB group in comparison to those obtained in healthy subjects. The ASR responses even of the masseter muscle, however, were similar between patients with SB and healthy individuals. Abnormal MIR provides support for the decreased inhibitory control of the central masticatory circuits in SB whereas normal ASR suggests the integrity and normal functioning of brainstem pathways mediating startle reaction. Although the sample size is small, our results are in line with previous findings and suggest an abnormally decreased inhibition in trigeminal motoneurons to masseter muscle rather than reticulobulbar pathways in patients with SB.