If a motor neuron's firing frequency increases significantly to a skeletal muscle fiber, which consequence follows regarding the muscle's contractile state?

💡 Explanation

As the firing frequency rises, individual muscle twitches summate, creating a stronger contraction; this mechanism is known as temporal summation. Because the muscle fiber does not fully relax between stimuli, unfused tetanus, a sustained but wavering contraction, results. Therefore, the muscle enters a state of unfused tetanus rather than producing increased twitch amplitude or undergoing reduced motor unit recruitment.

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