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Multiple motor learning experiences enhance motor adaptability.

Rachael D Seidler¹

¹Department of Psychology & Division of Kinesiology, University of Michigan, 401 Washtenaw Avenue, Ann Arbor, MI 48109-2214, USA. rseidler@umich.edu

Journal of Cognitive Neuroscience

|March 10, 2004

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Learning multiple motor skills enhances adaptability and speeds up future skill acquisition. However, this enhanced motor learning capacity comes at the cost of reduced movement stability when facing external disruptions.

Area of Science:

Motor control and learning
Neuroscience
Human motor performance

Background:

Traditional motor learning theories posit task-specific skill acquisition.
Emerging evidence suggests that diverse motor learning experiences may foster generalizable learning abilities.

Purpose of the Study:

To investigate whether exposure to varied motor learning paradigms enhances general motor skill learning capacity.
To determine if this enhanced capacity transfers to new, unrelated tasks and if it incurs any costs.

Main Methods:

Experimental group: learned a joystick-aiming task with adaptation to three visuomotor rotations, followed by adaptation to a gain change and a movement sequence.
Control groups: learned either the gain change or the movement sequence only.
Compared learning speed and transfer across tasks between groups.

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Main Results:

Experimental subjects demonstrated generalization across visuomotor rotations and faster learning on subsequent gain change and sequence tasks compared to controls.
However, experimental subjects' movements were more susceptible to transient perturbations, indicating reduced stability.

Conclusions:

Humans can acquire a generalized enhancement in motor skill learning capacity through varied practice.
This enhanced adaptability in motor learning is associated with a trade-off, leading to decreased movement stability under perturbation.