Modelling the maximum voluntary joint torque/angular velocity relationship in human movement

Modelling the maximum voluntary joint torque/angular velocity relationship in human movement.

The force exerted by a muscle is a function of the activation level and the maximum (tetanic) muscle force. In "maximum" voluntary knee extensions muscle activation is lower for eccentric muscle velocities than for concentric velocities. The aim of this study was to model this "differential activation" in order to calculate the maximum voluntary knee extensor torque as a function of knee angula...

The torque-velocity relationship in large human muscles: maximum voluntary versus electrically stimulated behaviour.

The in vivo maximum voluntary torque-velocity profile for large muscle groups differs from the in vitro tetanic profile with lower than expected eccentric torques. Using sub-maximal transcutaneous electrical stimulation has given torque-velocity profiles with an eccentric torque plateau ∼1.4 times the isometric value. This is closer to, but still less than, the in vitro tetanic profiles with pl...

Neural Network Modelling of Voluntary Single-Joint Movement Organization

Parkinson’s disease (PD) is a disabling motor disorder that affects all kinds of movements. In the early stages of PD, patients have difficulty with walking, speaking, or getting in and out of chairs (Gibbert 1986). As the disease progresses, all movements are affected resulting at the end of the disease a complete inability to move. Patients require intense concentration to overcome the appare...

Maximum voluntary ventilation prediction from the velocity-volume loop.

Neural Network Modelling of Voluntary Single Joint Movement Organization I. Normal Conditions

Voluntary movements are goal-directed movements triggered either by internal or external cues. Voluntary movements can be improved with practice as one learns to anticipate and correct for environmental obstacles that perturb the body. Single-joint rapid (ballistic) movements are goal-directed movements performed in a single action, without the need for corrective adjustments during its course....