Lennartz R C
Department of Physiology, Williams College, Williamstown, Massachusetts, 01267, USA.
Am J Physiol. 1999 Dec;277(6 Pt 2):S42-50. doi: 10.1152/advances.1999.277.6.S42.
A laboratory exercise is described in which students in a neuroscience, psychobiology, or similar laboratory course record the electromyogram (EMG) from themselves, using surface electrodes (placed on the skin). This exercise is intended to give students a firsthand demonstration that electrical activity is produced within them and to allow the students to use this activity to study biological and psychological concepts. The students study the nature of the EMG (changes with tension and the temporal relationship with limb movement) and the concepts of flexion and extension, reaction time, and patellar ("knee jerk") reflex. In postlaboratory evaluations, undergraduate introductory neuroscience students indicated that they appreciated the opportunity to record electrical activity from their own bodies. The students found the exercise enjoyable, believed that they had learned from it, and indicated that it should be a regular part of the course. If electrophysiology in animal preparations is already part of the course, this exercise requires minimal additional equipment, some of which is easily constructed and the reminder of which is available inexpensively.
本文描述了一项实验室练习，神经科学、心理生物学或类似实验室课程的学生使用表面电极（置于皮肤上）记录自己的肌电图（EMG）。这项练习旨在让学生直观地证明他们自身会产生电活动，并让学生利用这种活动来学习生物学和心理学概念。学生们研究肌电图的性质（随张力的变化以及与肢体运动的时间关系）以及屈伸、反应时间和髌（“膝跳”）反射的概念。在实验后的评估中，本科神经科学入门课程的学生表示，他们很珍惜有机会记录自己身体的电活动。学生们觉得这项练习很有趣，认为自己从中有所收获，并表示它应该成为课程的常规组成部分。如果动物实验中的电生理学已经是课程的一部分，那么这项练习所需的额外设备极少，其中一些很容易自制，其余的也能以低成本获得。
