Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
Department of Stomatgnathic Function and Occlusal Reconstruction, Institute of Biomedical Sciences, Clinical Dentistry, Tokushima University Graduate School, Tokushima, Japan.
J Oral Rehabil. 2020 Mar;47(3):281-288. doi: 10.1111/joor.12913. Epub 2019 Dec 3.
This study aims to verify the associations among sleep bruxism (SB), sleep arousal (SA) and concurrent body movements.
Subjects underwent a standard overnight polysomnography test and audio-video recordings. Sleep quality was evaluated according to the Rechtschaffen and Kales criteria, while SA was determined as per the American Sleep Disorders Association criteria. Analyses were performed by an external institution after masking of the subjects' information. SB was assessed based on the presence/absence of rhythmic masticatory muscle activity (RMMA) episodes, which were identified by using electromyography of the masseter muscle. The observed simultaneous movements included lower leg movement (LLM), swallowing, face scratching, head movement, body movement, eye blinking, coughing, licking, sighing, body scratching, lip sucking, somniloquy and yawning. The LLM was determined visually, as well as through an increase in the tibialis electromyogram signal. Other movements were visually assessed using audio-video recordings. The incidences of all the simultaneous movements were compared between RMMA with intercurrent SA (SAwRMMA; RMMA episode derived from a masseter electromyogram showing more than 10% of maximum voluntary contraction) and SA without RMMA (SAw/oRMMA).
Fourteen subjects were included in this study (females/males: 4/10, mean age: 31.5 ± 5.7 years). Among these, LLM, swallowing, body movement, licking, body scratching and lip sucking were frequently observed in SAwRMMA episodes than in SAw/oRMMA episodes, significantly. However, the non-specific simultaneous movements were higher observed in SAw/oRMMA episodes than that in SAwRMMA.
Our results suggest that SB is concurrently activated with LLM in relation to arousal.
本研究旨在验证睡眠磨牙症（SB）、睡眠觉醒（SA）与同时发生的身体运动之间的关联。
受试者接受标准的整夜多导睡眠图测试和视听记录。睡眠质量根据 Rechtschaffen 和 Kales 标准进行评估，而 SA 根据美国睡眠障碍协会标准确定。分析由外部机构在屏蔽受试者信息后进行。SB 通过咀嚼肌肌电图识别的节律性咀嚼肌活动（RMMA）发作的存在/不存在来评估。观察到的同时运动包括小腿运动（LLM）、吞咽、面部搔抓、头部运动、身体运动、眨眼、咳嗽、舔舐、叹息、身体搔抓、嘴唇吸吮、说梦话和打哈欠。LLM 通过视觉以及胫骨肌电图信号的增加来确定。其他运动通过视听记录进行视觉评估。比较了 RMMA 伴同时 SA（SAwRMMA；源自肌电图显示超过 10%最大随意收缩的 RMMA 发作）和无 RMMA 的 SA（SAw/oRMMA）中所有同时运动的发生率。
本研究纳入了 14 名受试者（女性/男性：4/10，平均年龄：31.5±5.7 岁）。其中，LLM、吞咽、身体运动、舔舐、身体搔抓和嘴唇吸吮在 SAwRMMA 发作中比在 SAw/oRMMA 发作中更频繁地观察到，差异有统计学意义。然而，非特异性同时运动在 SAw/oRMMA 发作中比在 SAwRMMA 发作中更为常见。
我们的结果表明，SB 与觉醒时的 LLM 同时激活。
