In experiment 3 Effect of increasing stimulus strength on mu

In experiment 3 (Effect of increasing stimulus strength on muscle twitch amplitude) above a certain stimulus current, the amplitude of the linger twitch no longer increases. How can you explain this based on your understanding of skeletal muscle contractions?

Solution

A twitch is a quick contraction of muscle when the stimulus is its high intensity/threshold. A single twitch in a muscle is a response to a single stimulus. If the threshold intensity increases, the twitch increases. If stimuli have been closer, the stronger the twitches have been. 10 Stimuli per second if get produced it leads to a treppe. The twitch has been stronger than the one before within a treppe. Treppe shows the wave pattern of stimuli with contraction and relaxation. Between a twitch to twitch, a small few seconds of latent period could be observed. The response to a stimulus is based on all-or-none response. If the stimulus has been in its threshold, then only response for a stimulus could be seen.