Comparison of techniques to determine human skeletal muscle voluntary activation
| Autor: | Samuel C. K. Lee, Stuart A. Binder-Macleod, Anastasia Zarkou, Scott K. Stackhouse |
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| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Volition medicine.medical_specialty Biophysics Neuroscience (miscellaneous) Stimulation Muscle Strength Dynamometer Article Quadriceps Muscle Random Allocation 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Humans Medicine Muscle Skeletal business.industry Skeletal muscle Muscle weakness 030229 sport sciences Electric Stimulation medicine.anatomical_structure Female Neurology (clinical) medicine.symptom business 030217 neurology & neurosurgery Muscle Contraction |
| Zdroj: | Journal of Electromyography and Kinesiology. 36:8-15 |
| ISSN: | 1050-6411 |
| DOI: | 10.1016/j.jelekin.2017.05.011 |
| Popis: | Determining volitional activation (VA) can provide insights on the cause of muscle weakness in orthopedic and neurological populations. Two electrical stimulation techniques are traditionally used to quantify VA: interpolation (IT) and superimposition (CAR). IT allows for a more accurate VA estimation, however it requires individuals to be stimulated twice, compared to once for CAR, and thus increases stimulation associated discomfort. To date, there is no agreement on what is the best practical technique for calculating quadriceps VA. This paper aims to address this problem by determining what reference force (i.e., using either peak force or force at the time of stimulation) and type of stimulation (train of pulses (burst), doublet, and twitch) is the best technique to use. Our findings showed that the IT with the force at the time of stimulation as a reference should be used to determine VA and that when a burst was used, the VA ratio computations were more accurate. Additionally, using a twitch with a 2ms pulse duration produced reliable VA calculations and may be an acceptable alternative for pain-sensitive subjects. Accurate assessment of VA deficits can help clinicians design rehabilitation programs that are based on subject-specific strength impairments and are more effective. |
| Databáze: | OpenAIRE |
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