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Updated: Aug 3, 2026

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Repeatability of high-frequency thresholds

T Frank1, L E Dreisbach

  • 1Department of Communication Disorders, Penn State University, University Park, Pennsylvania.

Ear and Hearing
|August 1, 1991
PubMed

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Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...