Sensitivity derivatives for flexible sensorimotor learning.

Full Abstract

To learn effectively, an adaptive controller needs to know its sensitivity derivatives--the variables that quantify how system performance depends on the commands from the controller. In the case of biological sensorimotor control, no one has explained how those derivatives themselves might be learned, and some authors suggest they are not learned at all but are known innately. Here we show that this knowledge cannot be solely innate, given the adaptive flexibility of neural systems. And we show how it could be learned using forms of information transport that are available in the brain. The mechanism, which we call implicit supervision, helps explain the flexibility and speed of sensorimotor learning and our ability to cope with high-dimensional work spaces and tools.

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Author information

Author/s: Abdelghani, M N (MN); Lillicrap, T P (TP); Tweed, D B (DB);

Affiliation: Department of Physiology, University of Toronto, Toronto, Ontario, Canada. mohamed.abdelghani(-atsign-)utoronto.ca

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: Neural computation (Neural Comput), published in United States. (Language: eng)

Reference: 2008-Aug; vol 20 (issue 8) : pp 2085-111

Dates: Created 2008/06/06; Completed 2008/08/11;

PMID: 18336076, status: MEDLINE (last retrieval date: 11/6/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adaptation, Physiological - physiology
Algorithms
Brain - physiology
Computer Simulation
Feedback - physiology

Feedback - physiology
Learning - physiology
Movement - physiology
Neural Networks (Computer)
Psychomotor Performance - physiology

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