Consecutive learning of opposing unimanual motor tasks using the right arm followed by the left arm causes intermanual interference
Intermanual transfer (motor memory generalization across arms) and motor memory interference (impairment of retest performance in consecutive motor learning) are well-investigated motor learning phenomena. However, the interplay of these phenomena remains elusive, i.e., whether intermanual interfere...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
May 1, 2017
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| In: |
PLOS ONE
Year: 2017, Jahrgang: 12, Heft: 5, Pages: e0176594 |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0176594 |
| Online-Zugang: | Verlag, LF, Volltext: http://dx.doi.org/10.1371/journal.pone.0176594 Verlag, LF, Volltext: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0176594 
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| Verfasserangaben: | Christian Stockinger, Benjamin Thürer, Thorsten Stein |
MARC
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| 245 | 1 | 0 | |a Consecutive learning of opposing unimanual motor tasks using the right arm followed by the left arm causes intermanual interference |c Christian Stockinger, Benjamin Thürer, Thorsten Stein |
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| 520 | |a Intermanual transfer (motor memory generalization across arms) and motor memory interference (impairment of retest performance in consecutive motor learning) are well-investigated motor learning phenomena. However, the interplay of these phenomena remains elusive, i.e., whether intermanual interference occurs when two unimanual tasks are consecutively learned using different arms. Here, we examine intermanual interference when subjects consecutively adapt their right and left arm movements to novel dynamics. We considered two force field tasks A and B which were of the same structure but mirrored orientation (B = -A). The first test group (ABA-group) consecutively learned task A using their right arm and task B using their left arm before being retested for task A with their right arm. Another test group (AAA-group) learned only task A in the same right-left-right arm schedule. Control subjects learned task A using their right arm without intermediate left arm learning. All groups were able to adapt their right arm movements to force field A and both test groups showed significant intermanual transfer of this initial learning to the contralateral left arm of 21.9% (ABA-group) and 27.6% (AAA-group). Consecutively, both test groups adapted their left arm movements to force field B (ABA-group) or force field A (AAA-group). For the ABA-group, left arm learning caused significant intermanual interference of the initially learned right arm task (68.3% performance decrease). The performance decrease of the AAA-group (10.2%) did not differ from controls (15.5%). These findings suggest that motor control and learning of right and left arm movements involve partly similar neural networks or underlie a vital interhemispheric connectivity. Moreover, our results suggest a preferred internal task representation in extrinsic Cartesian-based coordinates rather than in intrinsic joint-based coordinates because interference was absent when learning was performed in extrinsically equivalent fashion (AAA-group) but interference occurred when learning was performed in intrinsically equivalent fashion (ABA-group). | ||
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