Garrett N R, Kapur K K
J Prosthet Dent. 1986 Mar;55(3):352-6. doi: 10.1016/0022-3913(86)90119-8.
This study evaluates the reliability of a method to duplicate the location of surface electrodes for recording the electromyographic activity of masseter muscles during mastication and quantifying the activity by a microcomputer system. A plastic framework consisting of a bite fork and electrode positioners was used to place the electrodes by relating the positioners to an occlusal index and keeping this relationship constant at subsequent sittings. EMG recordings were repeated on two different days for each of 10 subjects while they performed standardized masticatory performance tests with peanuts and carrots. The muscle activity recorded with hardware integrators was an average of 26.7% of the computerized software integrations but measures derived from the two methods of integration were highly correlated (r = 0.965) and yielded similar results. Significant correlations were found between test sessions for each measure of masticatory performance and integrated EMG activity for ipsilateral and contralateral muscles. For each subject, no significant differences were found between sessions for any masticatory performance or EMG variable. The results indicate that reliable inter session EMG recordings during mastication can be made by using the template for positioning of the electrodes. In addition, the microcomputer data acquisition system provides results comparable to those obtained with conventional hardware integrators, with the added benefit of providing information on each individual stroke and its various components.
本研究评估了一种方法的可靠性，该方法用于复制表面电极的位置，以记录咀嚼过程中咬肌的肌电活动，并通过微机系统对该活动进行量化。使用由咬叉和电极定位器组成的塑料框架，通过将定位器与咬合指数相关联，并在后续 sittings 中保持这种关系恒定来放置电极。在 10 名受试者中的每一位在使用花生和胡萝卜进行标准化咀嚼性能测试时，在两天内重复进行肌电图记录。用硬件积分器记录的肌肉活动平均为计算机化软件积分的 26.7%，但从两种积分方法得出的测量值高度相关（r = 0.965），并产生相似的结果。在咀嚼性能的每种测量与同侧和对侧肌肉的积分肌电活动的测试 session 之间发现了显著相关性。对于每个受试者，在任何咀嚼性能或肌电图变量的 session 之间未发现显著差异。结果表明，通过使用电极定位模板，可以在咀嚼过程中进行可靠的 session 间肌电图记录。此外，微机数据采集系统提供的结果与用传统硬件积分器获得的结果相当，还具有提供关于每个单独冲程及其各个组成部分信息的额外优势。
