The influence of viscous loads on motor planning
نویسندگان
چکیده
The influence of viscous loads on motor planning Kurt A. Thoroughman, Wei Wang, and Dimitre N. Tomov Department of Biomedical Engineering, Washington University, St. Louis, Missouri, 63130, USA Influence of viscous loads on motor planning Correspondence should be addressed to Kurt A. Thoroughman Department of Biomedical Engineering, Washington University, St. Louis, Missouri, 63130, USA ([email protected]) Page 1 of 29 Articles in PresS. J Neurophysiol (May 23, 2007). doi:10.1152/jn.01126.2006
منابع مشابه
Influence of viscous loads on motor planning.
Here we computationally investigate how encumbering the hand could alter predictions made by the minimum torque change (MTC) and minimum endpoint variance hypotheses (MEPV) of movement planning. After minutes of training, people have made arm trajectories in a robot-generated viscous force field that were similar to previous baseline trajectories without the force field. We simulate the human a...
متن کاملThe role of internal models in motion planning and control: evidence from grip force adjustments during movements of hand-held loads.
We investigated the issue of whether or not the CNS makes use of an internal model of the motor apparatus in planning and controlling arm movements. In particular, we tested the ability of subjects to predict different hand-held loads by examining grip force adjustments used to stabilize the load in the hand during arm movements. Subjects grasped a manipulandum using a precision grip with the t...
متن کاملThe speed of the flagellar rotary motor of Escherichia coli varies linearly with protonmotive force.
A protonmotive force (pmf) across the cell's inner membrane powers the flagellar rotary motor of Escherichia coli. Speed is known to be proportional to pmf when viscous loads are heavy. Here we show that speed also is proportional to pmf when viscous loads are light. Two motors on the same bacterium were monitored as the cell was slowly deenergized. The first motor rotated the entire cell body ...
متن کاملKinematics and end-point control of arm movements are modified by unexpected changes in viscous loading.
These experiments were undertaken to evaluate whether the kinematics and end-point control of learned movements were affected by changes in dynamic loads or were determined largely by centrally specified motor programs. Human subjects performed flexion movements about the wrist in a discrete visual tracking task for a range of movement sizes. For some movements, viscosity was increased at movem...
متن کاملA General Rule for the Influence of Physical Damping on the Numerical Stability of Time Integration Analysis
The influence of physical damping on the numerical stability of time integration analysis is an open question since decades ago. In this paper, it is shown that, under specific very general conditions, physical damping can be disregarded when studying the numerical stability. It is also shown that, provided the specific conditions are met, analysis of structural systems involved in extremely hi...
متن کامل