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Tytuł pozycji:

An implicit plan overrides an explicit strategy during visuomotor adaptation.

Tytuł :
An implicit plan overrides an explicit strategy during visuomotor adaptation.
Autorzy :
Mazzoni P; Department of Neurology, Columbia University College of Physicians and Surgeons, New York, New York 10032, USA.
Krakauer JW
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Źródło :
The Journal of neuroscience : the official journal of the Society for Neuroscience [J Neurosci] 2006 Apr 05; Vol. 26 (14), pp. 3642-5.
Typ publikacji :
Journal Article; Randomized Controlled Trial; Research Support, N.I.H., Extramural
Język :
Imprint Name(s) :
Publication: Washington, DC : Society for Neuroscience
Original Publication: [Baltimore, Md.] : The Society, c1981-
MeSH Terms :
Task Performance and Analysis*
Discrimination Learning/*physiology
Motor Skills/*physiology
Neuronal Plasticity/*physiology
Visual Perception/*physiology
Adaptation, Physiological/physiology ; Adult ; Female ; Humans ; Male ; Middle Aged
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Grant Information :
K02 NS048099 United States NS NINDS NIH HHS
Entry Date(s) :
Date Created: 20060407 Date Completed: 20060426 Latest Revision: 20200225
Update Code :
PubMed Central ID :
Czasopismo naukowe
The relationship between implicit and explicit processes during motor learning, and for visuomotor adaptation in particular, is poorly understood. We set up a conflict between implicit and explicit processes by instructing subjects to counter a visuomotor rotation using a cognitive strategy in a pointing task. Specifically, they were told the exact nature of the directional perturbation, a rotation that directed them 45 degrees counterclockwise from the desired target, and they were instructed to counter it by aiming for the neighboring clockwise target, 45 degrees away. Subjects were initially successful in completely negating the rotation with this strategy. Surprisingly, however, they were unable to sustain explicit control and made increasingly large errors to the desired target. The cognitive strategy failed because subjects simultaneously adapted unconsciously to the rotation to the neighboring target. Notably, the rate of implicit adaptation to the neighboring target was not significantly different from rotation adaptation in the absence of an opposing explicit strategy. These results indicate that explicit strategies cannot substitute for implicit adaptation to a visuomotor rotation and are in fact overridden by the motor planning system. This suggests that the motor system requires that planned and executed trajectories remain congruous in visual space, and enforces this correspondence even at the expense of an opposing explicit task goal.

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