Why is it better that our muscles perform unfused tetanic contractions rather than single twitches in our
Introduction:
Muscle contraction is required for daily activities as well as for movements. Muscles contract when they are stimulated by nerve potential. When skeletal muscles innervated by motor neurons emit action potential at a very high rate, prolonged tetanic contractions are produced. Tetanic contractions can either be unfused or fused. When the muscles undergo partial relaxations before the next stimulus because they are stimulated at a fast rate, an unfused tetanic contraction is produced. However, during stimulation at a high rate, the muscle fibers do not relax between stimuli resulting in fused tetanic contraction.
A single contraction of muscles is referred to as a twitch. A single muscle twitch has three phases- the latent period, or lag phase, the contraction phase, and the relaxation phase.
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