Division of Applied Work Physiology, National Institute of Occupational Health, S-171 84 Solna, Sweden.
J Electromyogr Kinesiol. 1993;3(4):231-5. doi: 10.1016/1050-6411(93)90012-L.
The feasibility of action potential velocity (APV) measurements in the upper trapezius muscle with surface electrodes has been investigated. A four-bar electrode array connected to a double differential amplifier system was used. APV was estimated by a polarity correlation algorithm implemented on a PC computer. Six females and six males participated in the investigation. Attempts to get acceptable APV estimates were made in five electrode locations, 5 mm interspaced along the upper rim, beginning in the most distal part. Data were collected while holding out the arm horizontally in the sagittal plane. The results indicate that the method worked in five out of six males while it was difficult to get reliable estimates in the female group. Furthermore, the two most distal electrode locations gave the best results. In these two locations, the average APV for males was 4.8 m s(-1), sd 0.9. The difficulties in the female group were possibly due to small muscle dimensions and subcutaneous fat. Use of the double differential technique seems to be essential; attempts with the single differential technique were fruitless.
已经研究了使用表面电极在上斜方肌中测量动作电位速度（APV）的可行性。使用连接到双差分放大器系统的四杆电极阵列。APV 通过在 PC 计算机上实现的极性相关算法来估计。六名女性和六名男性参与了调查。尝试在沿着上边缘间隔 5 毫米的五个电极位置获得可接受的 APV 估计值，从最远端开始。在矢状面中将手臂水平伸出时收集数据。结果表明，该方法在六名男性中的五名中有效，而在女性组中很难获得可靠的估计值。此外，两个最远端的电极位置给出了最好的结果。在这两个位置，男性的平均 APV 为 4.8 m s(-1)，标准差为 0.9。女性组的困难可能是由于肌肉尺寸小和皮下脂肪多。似乎必须使用双差分技术；单差分技术的尝试没有成功。
