Department of Rehabilitation Medicine I, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan.
Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Toyoake, Aichi, Japan.
Neuromodulation. 2019 Jul;22(5):593-596. doi: 10.1111/ner.12777. Epub 2018 Apr 2.
Neuromuscular electrical stimulation has been widely used in patients with dysphagia. However, obtaining sufficient hyoid bone movement through surface electrodes seems difficult. The aim of this study was to evaluate hyoid bone movement at rest through peripheral magnetic stimulation of the suprahyoid muscles in normal individuals.
Healthy adult men were recruited. A specially designed coil was connected to the peripheral magnetic stimulator. The coil was placed on the submental area of the subjects. Magnetic stimulation was performed at 30 Hz for 2 sec. The intensity level selected induces hyoid bone movement without causing intolerable pain to the subjects. The hyoid bone at rest between on- and off-magnetic stimulations of the suprahyoid muscles were identified using fluoroscopy at 30 frames/sec in lateral projection. Pain during peripheral magnetic stimulation was evaluated using the numerical rating scale (NRS).
Eleven subjects aged 32 ± 9 years participated in this study. Magnetic stimulation resulted in 10.9 ± 2.8 mm forward displacement and 8.3 ± 4.1 mm (mean ± SD) upward displacement of the hyoid bone. The median NRS score during magnetic stimulation was 1.
Peripheral magnetic stimulation is noninvasive and easy to perform. It does not require skin preparation, facilitates sufficient hyoid bone movement, and causes minimum level of pain.
神经肌肉电刺激已广泛应用于吞咽障碍患者。然而，通过表面电极获得足够的舌骨运动似乎很困难。本研究旨在评估正常人静息状态下通过颏舌骨肌外周磁刺激的舌骨运动。
招募健康成年男性。专门设计的线圈与外周磁刺激器相连。线圈放置在受试者的颏下区域。以 30 Hz 的频率进行 2 秒的磁刺激。所选的强度水平可引起舌骨运动，而不会引起受试者难以忍受的疼痛。在侧位透视下以 30 帧/秒的速度记录颏舌骨肌磁刺激前后的静息状态下的舌骨。使用数字评分量表（NRS）评估外周磁刺激时的疼痛。
11 名年龄 32±9 岁的受试者参与了这项研究。磁刺激导致舌骨向前移动 10.9±2.8mm，向上移动 8.3±4.1mm（平均值±标准差）。磁刺激过程中的中位数 NRS 评分为 1。
外周磁刺激具有非侵入性和易于操作的特点。它不需要皮肤准备，可实现充分的舌骨运动，且疼痛程度最小。
