Muscle Contraction Lab Report

In this lab, we are measuring the EMG amp (mV), or electrical activity, from action potentials produced from muscle contractions in order to gain an indication of the number of active motor units used in the contraction. This is done by adding more load to the muscle or force. There is examining of the EMG amp produced from a twitch at varying levels of muscle force and EMG amp from muscles when more load is placed on them. During the experiment, we set up the equipment, electrodes and software using the instructions provided online. As indicated, we skipped the ‘Fatigue’ lab. When recording data, the EMG amp (mV) was dependent on the muscle force and number of books added. In order to accept the data, there had to be an increase in mV when