J. Cogn. Neurosci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Cisek, P.
Right arrow Articles by Bullock, D.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Cisek, P.
Right arrow Articles by Bullock, D.

The Journal of Cognitive Neuroscience, Vol 10, 425-444, Copyright © 1998 by The MIT Press

ARTICLES

A Cortico-Spinal Model of Reaching and Proprioception under Multiple Task Constraints

Paul Cisek, Stephen Grossberg and Daniel Bullock

A model of cortico-spinal trajectory generation for voluntary reaching movements is developed to functionally interpret a broad range of behavioral, physiological, and anatomical data. The model simulates how arm movements achieve their remarkable efficiency and accuracy in response to widely varying positional, speed, and force constraints. A key issue in arm movement control is how the brain copes with such a wide range of movement contexts. The model suggests how the brain may set automatic and volitional gating mechanisms to vary the balance of static and dynamic feedback information to guide the movement command and to compensate for external forces. For example, with increasing movement speed, the system shifts from a feedback position controller to a feedforward trajectory generator with superimposed dynamics compensation. Simulations of the model illustrate how it reproduces the effects of elastic loads on fast movements, endpoint errors in Coriolis fields, and several effects of muscle tendon vibration, including tonic and antagonist vibration reflexes, position and movement illusions, effects of obstructing the tonic vibration reflex, and reaching undershoots caused by antagonist vibration.


This article has been cited by other articles:


Home page
 J. Neurophysiol.Home page
E. Trainin, R. Meir, and A. Karniel
Explaining Patterns of Neural Activity in the Primary Motor Cortex Using Spinal Cord and Limb Biomechanics Models
J Neurophysiol, May 1, 2007; 97(5): 3736 - 3750.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurosci.Home page
P. Cisek
Integrated neural processes for defining potential actions and deciding between them: a computational model.
J. Neurosci., September 20, 2006; 26(38): 9761 - 9770.
[Abstract] [Full Text] [PDF]

Home page
 J. Cogn. Neurosci.Home page
J. C. Dessing, C. (L. E. Peper, D. Bullock, and P. J. Beek
How Position, Velocity, and Temporal Information Combine in the Prospective Control of Catching: Data and Model
J. Cogn. Neurosci., April 1, 2005; 17(4): 668 - 686.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
NEURAL COMPUTATION J COGNITIVE NEUROSCIENCE MIT PRESS JOURNALS
Copyright © 1998 by The MIT Press.