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Twitch Contraction

Description
The brief contraction of all muscle fibers in a motor unit in response to a single action potential
Latent period
Contraction period
Relaxation period
Refractory period

Frequency of Stimulation

Wave summation occurs when a second action potential triggers muscle contraction  before the first contraction has finished
Results in a stronger contraction
Unfused tetanus
Fused tetanus
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