Q:

What is a sustained contraction called?

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Quick Answer

A sustained contraction is called muscle tetanus. Muscles are stimulated to contract by signals from motor neurons connected to the central nervous system. Muscle tetanus occurs when the muscle receives a high frequency of stimulation.

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Full Answer

The force and frequency of the stimulation from the central nervous system and the type of muscle fiber receiving the stimulation all affect the intensity and duration of the muscle contraction. The force and frequency of the stimulation from the central nervous system and the type of muscle fiber receiving the stimulation all affect the intensity and duration of the muscle contraction. Sustained contractions can result in muscle fatigue, inhibiting muscle response to further stimulation. Weak muscle fibers are more likely to fatigue.

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