Müller Christian, Nicoletti Corinne, Omlin Sarah, Brink Mark, Läubli Thomas
Occupational Health Management, SBB AG, Swiss Federal Railways, Hilfikerstrasse 1, 3000 Bern, Switzerland.
ETH Zürich, Department of Health Sciences and Technology, Sensory-Motor Systems Lab, Sonneggstrasse 3, ML G57, CH-8092 Zurich, Switzerland.
J Electromyogr Kinesiol. 2015 Jun;25(3):457-62. doi: 10.1016/j.jelekin.2015.01.010. Epub 2015 Feb 12.
Former studies reported a relationship between increased nocturnal low level trapezius muscle activity and neck or shoulder pain but it has not been explored whether trapezius muscle relaxation is related to sleep stages. The goal of the present study was to investigate whether trapezius muscle activity is related to different sleep stages, as measured by polysomnography.
Twenty one healthy subjects were measured on four consecutive nights in their homes, whereas the first night served as adaptation night. The measurements included full polysomnography (electroencephalography (EEG), electrooculography (EOG), electromyography (EMG) and electrocardiography (ECG)), as well as surface EMG of the m. trapezius descendens of the dominant arm.
Periods with detectable EMG activity of the trapezius muscle lasted on average 1.5% of the length of the nights and only in four nights it lasted longer than 5% of sleeping time. Neither rest time nor the length of periods with higher activity levels of the trapezius muscle did significantly differ between sleep stages.
We found no evidence that nocturnal trapezius muscle activity is markedly moderated by the different sleep stages. Thus the results support that EMG measurements of trapezius muscle activity in healthy subjects can be carried out without concurrent polysomnographic recordings.
既往研究报道夜间斜方肌低水平活动增加与颈部或肩部疼痛之间存在关联，但尚未探讨斜方肌放松是否与睡眠阶段有关。本研究的目的是通过多导睡眠图来调查斜方肌活动是否与不同睡眠阶段有关。
21名健康受试者在其家中连续四个晚上接受测量，第一个晚上作为适应夜。测量包括全多导睡眠图（脑电图（EEG）、眼电图（EOG）、肌电图（EMG）和心电图（ECG）），以及优势手臂斜方肌降肌的表面肌电图。
斜方肌肌电图活动可检测到的时间段平均占夜间时长的1.5%，只有四个晚上其持续时间超过睡眠时间的5%。睡眠阶段之间，斜方肌休息时间和活动水平较高时间段的长度均无显著差异。
我们没有发现证据表明不同睡眠阶段会显著调节夜间斜方肌活动。因此，结果支持在健康受试者中进行斜方肌活动的肌电图测量时无需同时进行多导睡眠图记录。
