Maffiuletti, Nicola and Barbero, Marco and Cescon, Corrado and Clijsen, Ron and Beretta Piccoli, Matteo and Schneebeli, Alessandro and Preiss, Stefan and Togninalli, Danilo (2016) Validity of the twitch interpolation technique for the assessment of quadriceps neuromuscular asymmetries. Journal of Electromyography and Kinesiology, 31 (6). ISSN 1050-6411
Full text not available from this repository.Abstract
This study examined the validity of the twitch interpolation technique for evaluating side-to-side asymmetries in quadriceps neuromuscular function. Fifty-six subjects with a wide range of asymmetries (19 healthy, 24 with unilateral and 13 with bilateral anterior cruciate ligament reconstruction) took part in the study. Supramaximal electrical paired stimuli were delivered to the quadriceps muscle during and immediately after a maximal voluntary contraction (MVC) of the knee extensors (twitch interpolation technique). MVC torque, voluntary activation and resting doublet-evoked torque were measured separately for the two sides, and percent side-to-side asymmetries were calculated for each parameter. MVC torque asymmetry was plotted against voluntary activation asymmetry and doublet-evoked torque asymmetry, and a multiple regression analysis was also conducted. Significant positive correlations were observed between MVC torque asymmetry and both voluntary activation asymmetry (r=0.40; p=0.002) and doublet-evoked torque asymmetry (r=0.53; p<0.001), and their relative contribution to MVC torque asymmetry was comparable (r=0.64; p<0.001). These results establish the validity of the twitch interpolation technique for the assessment of neuromuscular asymmetries. This methodology could provide useful insights into the contribution of some neural and muscular mechanisms that underlie quadriceps strength deficits.
| Item Type: | Scientific journal article, Newspaper article or Magazine article |
|---|---|
| Uncontrolled Keywords: | Activation; Contractility; Strength; Weakness |
| Subjects: | Subjects Allied to Medicine > Anatomy, physiology & pathology > Physiology > Clinical physiology |
| Department/unit: | Dipartimento economia aziendale, sanità e sociale |
| Depositing User: | Matteo Beretta Piccoli |
| Date Deposited: | 20 Jun 2016 11:43 |
| Last Modified: | 20 Jun 2016 11:43 |
| URI: | http://repository.supsi.ch/id/eprint/7435 |
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