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Geometric Structure of the Adaptive Controller of the Human Arm

Author(s)
Shadmehr, Reza; Mussa-Ivaldi, Ferdinando
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Abstract
The objects with which the hand interacts with may significantly change the dynamics of the arm. How does the brain adapt control of arm movements to this new dynamic? We show that adaptation is via composition of a model of the task's dynamics. By exploring generalization capabilities of this adaptation we infer some of the properties of the computational elements with which the brain formed this model: the elements have broad receptive fields and encode the learned dynamics as a map structured in an intrinsic coordinate system closely related to the geometry of the skeletomusculature. The low--level nature of these elements suggests that they may represent asset of primitives with which a movement is represented in the CNS.
Date issued
1993-07-01
URI
http://hdl.handle.net/1721.1/7210
Other identifiers
AIM-1437
CBCL-082
Series/Report no.
AIM-1437CBCL-082
Keywords
motor learning, force fields, virtual environments, motorscontrol, internal models, reaching movements

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  • CBCL Memos (1993 - 2004)

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