Jiangxi Mental Hospital, Nanchang University, Jiangxi, China.
Queen Mary College, Nanchang University, Jiangxi, China.
J Oral Rehabil. 2019 May;46(5):399-408. doi: 10.1111/joor.12760. Epub 2019 Jan 13.
Most rhythmic masticatory muscle activities (RMMAs) have been shown to be accompanied with limb movements (LMs) in sleep bruxism (SB) patients during sleep.
To compare the relationships between RMMAs and LMs in SB patients and normal subjects.
Polysomnographic recordings were performed on eight SB patients and nine normal subjects and the frequencies and durations of RMMAs as well as LMs were determined. Linear regression and correlation analysis were performed to study the relationship between durations of RMMAs and LMs when RMMAs occurred with LMs.
Most LMs in SB patients, but not in normal subjects, were accompanied with RMMAs. RMMAs in SB patients were more likely to be isolated, phasic or mixed, while RMMAs in normal subjects were more likely to be tonic. The frequencies of LMs, isolated RMMAs and RMMAs accompanied with LMs in SB patients were significantly higher than those in normal subjects. Furthermore, linear regression and correlation analysis showed that duration of RMMAs was significantly associated with that of LMs when RMMAs occurred with LMs. The duration of RMMAs, when accompanied with LMs, in SB patients was significantly longer than that in normal subjects.
Close relationships between LMs and RMMAs exist in SB patients and normal subjects, and SB episodes may be part of cortical arousal responses and the increased cortical activities associated with SB episodes may not just be localised to the central nervous system (CNS) that controls jaw movements but may also include other parts of CNS that controls LMs.
大多数睡眠磨牙症（SB）患者在睡眠中出现的节律性咀嚼肌活动（RMMAs）都伴有肢体运动（LMs）。
比较 SB 患者和正常受试者中 RMMAs 与 LMs 之间的关系。
对 8 例 SB 患者和 9 例正常受试者进行多导睡眠图记录，确定 RMMAs 和 LMs 的频率和持续时间。当 RMMAs 与 LMs 同时发生时，采用线性回归和相关分析来研究 RMMAs 持续时间与 LMs 持续时间之间的关系。
SB 患者的大多数 LMs 伴有 RMMAs，但正常受试者则不然。SB 患者的 RMMAs 更可能是孤立的、阶段性的或混合性的，而正常受试者的 RMMAs 更可能是紧张性的。SB 患者的 LMs、孤立的 RMMAs 和伴有 LMs 的 RMMAs 频率明显高于正常受试者。此外，线性回归和相关分析表明，当 RMMAs 与 LMs 同时发生时，RMMAs 的持续时间与 LMs 的持续时间显著相关。SB 患者伴有 LMs 的 RMMAs 持续时间明显长于正常受试者。
SB 患者和正常受试者的 LMs 与 RMMAs 之间存在密切关系，SB 发作可能是皮质觉醒反应的一部分，与 SB 发作相关的皮质活动增加不仅局限于控制下颌运动的中枢神经系统（CNS），还可能包括控制 LMs 的 CNS 的其他部分。
