| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
The Journal of Neurophysiology Vol. 86 No. 2 August 2001, pp. 971-985
Copyright ©2001 by the American Physiological Society
1Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin 53201; and 2Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Chicago, Illinois 60611
Scheidt, Robert A.,
Jonathan B. Dingwell, and
Ferdinando A. Mussa-Ivaldi.
Learning to Move Amid Uncertainty. J. Neurophysiol. 86: 971-985, 2001. We studied how subjects
learned to make movements against unpredictable perturbations. Twelve
healthy human subjects made goal-directed reaching movements in the
horizontal plane while holding the handle of a two-joint robotic
manipulator. The robot generated viscous force fields that perturbed
the limb perpendicular to the desired direction of movement. The
amplitude (but not the direction) of the viscous field varied randomly
from trial to trial. Systems identification techniques were employed to
characterize how subjects adapted to these random perturbations.
Subject performance was quantified primarily using the peak deviation
from a straight-line hand path. Subjects adapted their arm movements to
the sequence of random force-field amplitudes. This adaptive response
compensated for the approximate mean from the random sequence of
perturbations and did not depend on the statistical distribution of
that sequence. Subjects did not adapt by directly counteracting the
mean field strength itself on each trial but rather by using
information about perturbations and movement errors from a limited
number of previous trials to adjust motor commands on subsequent
trials. This strategy permitted subjects to achieve near-optimal
performance (defined as minimizing movement errors in a least-squares
sense) while maintaining computational efficiency. A simple model using information about movement errors and perturbation amplitudes from a
single previous trial predicted subject performance in stochastic
environments with a high degree of fidelity and further predicted key
performance features observed in nonstochastic environments. This
suggests that the neural structures modified during motor adaptation
require only short-term memory. Explicit representations regarding
movements made more than a few trials in the past are not used in
generating optimal motor responses on any given trial.
This article has been cited by other articles:
|
|
 |
|
  M. Casadio, V. Sanguineti, P. Morasso, and C. Solaro Abnormal sensorimotor control, but intact force field adaptation, in multiple sclerosis subjects with no clinical disability Multiple Sclerosis, April 1, 2008; 14(3): 330 - 342. [Abstract] [PDF]
|
|
|
|
 |
|
 J. Izawa, T. Rane, O. Donchin, and R. Shadmehr Motor Adaptation as a Process of Reoptimization J. Neurosci., March 12, 2008; 28(11): 2883 - 2891. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 C. Ghez, R. Scheidt, and H. Heijink Different Learned Coordinate Frames for Planning Trajectories and Final Positions in Reaching J Neurophysiol, December 1, 2007; 98(6): 3614 - 3626. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. A. Scheidt and C. Ghez Separate Adaptive Mechanisms for Controlling Trajectory and Final Position in Reaching J Neurophysiol, December 1, 2007; 98(6): 3600 - 3613. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. R. Hinder and T. E. Milner Rapid Adaptation to Scaled Changes of the Mechanical Environment J Neurophysiol, November 1, 2007; 98(5): 3072 - 3080. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 Y.-C. Pai and T. S Bhatt Repeated-Slip Training: An Emerging Paradigm for Prevention of Slip-Related Falls Among Older Adults Physical Therapy, November 1, 2007; 87(11): 1478 - 1491. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. S. Fine and K. A. Thoroughman Trial-by-Trial Transformation of Error Into Sensorimotor Adaptation Changes With Environmental Dynamics J Neurophysiol, September 1, 2007; 98(3): 1392 - 1404. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. A. Taylor and K. A. Thoroughman Divided Attention Impairs Human Motor Adaptation But Not Feedback Control J Neurophysiol, July 1, 2007; 98(1): 317 - 326. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. L. Emken, R. Benitez, A. Sideris, J. E. Bobrow, and D. J. Reinkensmeyer Motor Adaptation as a Greedy Optimization of Error and Effort J Neurophysiol, June 1, 2007; 97(6): 3997 - 4006. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
V. S. Huang and R. Shadmehr Evolution of Motor Memory During the Seconds After Observation of Motor Error J Neurophysiol, June 1, 2007; 97(6): 3976 - 3985. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Cheng and P. N. Sabes Calibration of Visually Guided Reaching Is Driven by Error-Corrective Learning and Internal Dynamics J Neurophysiol, April 1, 2007; 97(4): 3057 - 3069. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. A. Scheidt and T. Stoeckmann Reach Adaptation and Final Position Control Amid Environmental Uncertainty After Stroke J Neurophysiol, April 1, 2007; 97(4): 2824 - 2836. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 P. M. Bays and D. M. Wolpert Computational principles of sensorimotor control that minimize uncertainty and variability J. Physiol., January 15, 2007; 578(2): 387 - 396. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. Gupta and J. Ashe Lack of Adaptation to Random Conflicting Force Fields of Variable Magnitude J Neurophysiol, January 1, 2007; 97(1): 738 - 745. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. M. Joiner and M. Shelhamer Responses to Noisy Periodic Stimuli Reveal Properties of a Neural Predictor J Neurophysiol, October 1, 2006; 96(4): 2121 - 2126. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. E. Milner and M. R. Hinder Position Information But Not Force Information Is Used in Adapting to Changes in Environmental Dynamics J Neurophysiol, August 1, 2006; 96(2): 526 - 534. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. S. Fine and K. A. Thoroughman Motor Adaptation to Single Force Pulses: Sensitive to Direction but Insensitive to Within-Movement Pulse Placement and Magnitude J Neurophysiol, August 1, 2006; 96(2): 710 - 720. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. Cheng and P. N. Sabes Modeling sensorimotor learning with linear dynamical systems. Neural Comput., April 1, 2006; 18(4): 760 - 793. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 C. D. Takahashi, D. Nemet, C. M. Rose-Gottron, J. K. Larson, D. M. Cooper, and D. J. Reinkensmeyer Effect of muscle fatigue on internal model formation and retention during reaching with the arm J Appl Physiol, February 1, 2006; 100(2): 695 - 706. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. A. Thoroughman and J. A. Taylor Rapid Reshaping of Human Motor Generalization J. Neurosci., September 28, 2005; 25(39): 8948 - 8953. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. E. Milner and D. W. Franklin Impedance control and internal model use during the initial stage of adaptation to novel dynamics in humans J. Physiol., September 1, 2005; 567(2): 651 - 664. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Trommershauser, S. Gepshtein, L. T. Maloney, M. S. Landy, and M. S. Banks Optimal Compensation for Changes in Task-Relevant Movement Variability J. Neurosci., August 3, 2005; 25(31): 7169 - 7178. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Miyazaki, D. Nozaki, and Y. Nakajima Testing Bayesian Models of Human Coincidence Timing J Neurophysiol, July 1, 2005; 94(1): 395 - 399. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. A. Scheidt, M. A. Conditt, E. L. Secco, and F. A. Mussa-Ivaldi Interaction of Visual and Proprioceptive Feedback During Adaptation of Human Reaching Movements J Neurophysiol, June 1, 2005; 93(6): 3200 - 3213. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. A. Smith and R. Shadmehr Intact Ability to Learn Internal Models of Arm Dynamics in Huntington's Disease But Not Cerebellar Degeneration J Neurophysiol, May 1, 2005; 93(5): 2809 - 2821. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. K. Wainscott, O. Donchin, and R. Shadmehr Internal Models and Contextual Cues: Encoding Serial Order and Direction of Movement J Neurophysiol, February 1, 2005; 93(2): 786 - 800. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Zago, G. Bosco, V. Maffei, M. Iosa, Y. P. Ivanenko, and F. Lacquaniti Fast Adaptation of the Internal Model of Gravity for Manual Interceptions: Evidence for Event-Dependent Learning J Neurophysiol, February 1, 2005; 93(2): 1055 - 1068. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. P. Kording, S.-p. Ku, and D. M. Wolpert Bayesian Integration in Force Estimation J Neurophysiol, November 1, 2004; 92(5): 3161 - 3165. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. P. Kording and D. M. Wolpert The loss function of sensorimotor learning PNAS, June 29, 2004; 101(26): 9839 - 9842. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
W. J. Kargo and D. A. Nitz Early Skill Learning Is Expressed through Selection and Tuning of Cortically Represented Muscle Synergies J. Neurosci., December 3, 2003; 23(35): 11255 - 11269. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. W. Franklin, R. Osu, E. Burdet, M. Kawato, and T. E. Milner Adaptation to Stable and Unstable Dynamics Achieved By Combined Impedance Control and Inverse Dynamics Model J Neurophysiol, November 1, 2003; 90(5): 3270 - 3282. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
O. Donchin, J. T. Francis, and R. Shadmehr Quantifying Generalization from Trial-by-Trial Behavior of Adaptive Systems that Learn with Basis Functions: Theory and Experiments in Human Motor Control J. Neurosci., October 8, 2003; 23(27): 9032 - 9045. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. D. Takahashi, D. Nemet, C. M. Rose-Gottron, J. K. Larson, D. M. Cooper, and D. J. Reinkensmeyer Neuromotor Noise Limits Motor Performance, But Not Motor Adaptation, in Children J Neurophysiol, August 1, 2003; 90(2): 703 - 711. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Y.-C. Pai, J. D. Wening, E. F. Runtz, K. Iqbal, and M. J. Pavol Role of Feedforward Control of Movement Stability in Reducing Slip-Related Balance Loss and Falls Among Older Adults J Neurophysiol, August 1, 2003; 90(2): 755 - 762. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. J. Baddeley, H. A. Ingram, and R. C. Miall System Identification Applied to a Visuomotor Task: Near-Optimal Human Performance in a Noisy Changing Task J. Neurosci., April 1, 2003; 23(7): 3066 - 3075. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. M. Quaney, D. L. Rotella, C. Peterson, and K. J. Cole Sensorimotor Memory For Fingertip Forces: Evidence For A Task-Independent Motor Memory J. Neurosci., March 1, 2003; 23(5): 1981 - 1986. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| Visit Other APS Journals Online |
