There is no nonvolitional method of assessing quadriceps strength which both supramaximally activates the muscle and is acceptable to subjects. In 10 normal subjects and 10 patients with suspected muscle weakness we used magnetic stimulation of the femoral nerve to elicit an isometric twitch and mea
Transcutaneous magnetic stimulation of the quadriceps via the femoral nerve
β Scribed by Ian J. Kremenic; S. Simon Ben-Avi; Dan Leonhardt; Malachy P. McHugh
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 101 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0148-639X
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β¦ Synopsis
Abstract
We investigated the efficacy of different frequencies and intensities of magnetic stimulation for activating the quadriceps muscles; a painless method for stimulating the quadriceps would be useful in the rehabilitation of patients who have difficulty in voluntarily activating their muscles after injury or surgery. Eleven subjects underwent magnetic stimulation of the femoral nerve over a range of frequencies and intensities using a MagStim Rapid magnetic stimulator. Magnetic stimulation at 30 Hz at 80% of the power output of the stimulator used was capable of generating 72% of quadriceps maximal voluntary contraction torque. Subjects reported little or no pain during the procedure. Magnetic stimulation of the femoral nerve is a wellβtolerated way to activate the quadriceps muscles. Muscle Nerve 30: 379β381, 2004
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