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http://hdl.handle.net/2183/36348 Response of spinal excitability to different short-lasting motor tasks: preliminary results
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Madrid, Antonio
Valls-Solé, Josep
Oliviero, Antonio
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Madrid A, Robles-García V, Corral-Bergantiños Y, Valls-Solé J, Oliviero A, Cudeiro J, Arias P. Response of spinal excitability to different short-lasting motor tasks: preliminary results. In: Ibáñez J, González-Vargas J, Azorín J, et al, editors. Converging clinical and engineering research on neurorehabilitation II: proceedings of the 3rd International Conference on NeuroRehabilitation (ICNR2016), October 18–21, 2016, Segovia, Spain. Cham, Switzerland: Springer: 2016. p.1007-1012. (Biosystems & Biorobotics; 15).
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Abstract
[Abstract] Understanding the origin of muscle fatigue is essential for optimizing
neuro-rehabilitation treatments. Fatigue is tasks dependent and its neural substrates
have been deeply addressed for isometric contractions. However, we recently
showed differences in the silent periods generated at cortical or spinal levels after
brief maximal rate finger tapping or isometric force tasks, advocating for a cortical
but not spinal origin of fatigue for repetitive movements. Here we extend our
previous findings by exploring another spinal cord circuits, as well as analyzing the
modification of the compound muscle action potential. We use electric cervi-
comedullary stimulation (n = 7) and the recording of the compound muscle action
potential, always at the time of fatigue. Once more our results suggest a different
place of fatigue onset for each type of task. Fatigue evoked by maximal rate finger
tapping does not have its origin at spinal cord level.