Abstract
This study investigates whether rate of torque development (RTD) and/or torque amplitude are reflected in the movement-related potentials (MRPs) preceding and accompanying isometric activation of plantar flexor muscles. Subjects were asked to perform six different tasks involving the left ankle joint. The tasks consisted of voluntary isometric plantar flexions at three different RTDs (two fixed rates and a ‘ballistic’ task) ending at two different torque amplitudes. The main observations from the analysis of the MRPs were: 1) the readiness potentials (RP) demonstrated a statistically significant discrimination between low and high torque amplitudes; 2) the RP, the motor potentials (MP) and the movement-monitoring potentials (MMP) could be statistically differentiated among the different RTDs; and 3) in general the MRPs demonstrated an ipsilateral tendency in relation to the involved limb. The results indicate that RP is a suitable parameter for differentiation between levels of isometric plantar flexion torque and MP and MMP are sensitive to a differentiation between RTDs. The correlation between MRPs and motor tasks involving different rates of torque development and levels of torque suggests that MRPs may comprise a potential solution for programming of intended movements to be executed by systems based on neural rehabilitation technology.
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Abbreviations
- MP:
-
Motor potential
- MMP:
-
Movement-monitoring potential
- MRP:
-
Movement-related potential
- RP:
-
Readiness potential
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Acknowledgements
The authors want to thank the financial support provided by Vale do Paraíba University (UNIVAP) and the Center for Sensory-Motor Interaction (SMI) from the Department of Health Science & Technology (HST) at Aalborg University (AAU).
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do Nascimento, O.F., Nielsen, K.D. & Voigt, M. Relationship between plantar-flexor torque generation and the magnitude of the movement-related potentials. Exp Brain Res 160, 154–165 (2005). https://doi.org/10.1007/s00221-004-1996-9
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DOI: https://doi.org/10.1007/s00221-004-1996-9