Force Steadiness: From Motor Units to Voluntary Actions
Roger M. Enoka, Dario Farina
Abstract
Voluntary actions are controlled by the synaptic inputs that are shared by pools of spinal motor neurons. The slow common oscillations in the discharge times of motor units due to these synaptic inputs are strongly correlated with the fluctuations in force during submaximal isometric contractions (force steadiness) and moderately associated with performance scores on some tests of motor function. However, there are key gaps in knowledge that limit the interpretation of differences in force steadiness.
Topics & Concepts
Isometric exercisePhysical medicine and rehabilitationMotor unitTurnoverMotor functionNeurosciencePsychologyMedicinePhysical therapyEconomicsManagementMuscle activation and electromyography studiesMotor Control and AdaptationBalance, Gait, and Falls Prevention