http://www.sciencemag.org/content/early/2014/08/13/science.1253138.abstract
+ Author Affiliations
- ↵*Corresponding author: E-mail: dherzfe1@jhmi.edu
The current view of motor learning
suggests that when we revisit a task, the brain recalls the motor
commands it previously
learned. In this view, motor memory is a memory
of motor commands, acquired through trial-and-error and reinforcement.
Here,
we show that the brain controls how much it is
willing to learn from the current error through a principled mechanism
that
depends on the history of past errors. This
suggests that the brain stores a previously unknown form of memory, a
memory of
errors. A mathematical formulation of this idea
provides insights into a host of puzzling experimental data, including
savings
and meta-learning, demonstrating that when we
are better at a motor task, it is partly because the brain recognizes
the errors
it experienced before.
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