Movements of individual digits in bimanual prehension are coupled into a grasping component.
The classic understanding of prehension is that of coordinated reaching and grasping. An alternative view is that the grasping in prehension emerges from independently controlled individual digit movements (the double-pointing model). The current study tested this latter model in bimanual prehension...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2014-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4037218?pdf=render |
| _version_ | 1818583612806660096 |
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| author | Frank T J M Zaal Raoul M Bongers |
| author_facet | Frank T J M Zaal Raoul M Bongers |
| author_sort | Frank T J M Zaal |
| collection | DOAJ |
| description | The classic understanding of prehension is that of coordinated reaching and grasping. An alternative view is that the grasping in prehension emerges from independently controlled individual digit movements (the double-pointing model). The current study tested this latter model in bimanual prehension: participants had to grasp an object between their two index fingers. Right after the start of the movement, the future end position of one of the digits was perturbed. The perturbations resulted in expected changes in the kinematics of the perturbed digit but also in adjusted kinematics in the unperturbed digit. The latter effects showed up when the end position of the right index finger was perturbed, but not when the end position of the left index finger was perturbed. Because the absence of a coupling between the digits is the core assumption of the double-pointing model, finding any perturbation effects challenges this account of prehension; the double-pointing model predicts that the unperturbed digit would be unaffected by the perturbation. The authors conclude that the movement of the digits in prehension is coupled into a grasping component. |
| first_indexed | 2024-12-16T08:08:03Z |
| format | Article |
| id | doaj.art-ab3671e8218a4621bfaa7160ab57051b |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-16T08:08:03Z |
| publishDate | 2014-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-ab3671e8218a4621bfaa7160ab57051b2022-12-21T22:38:25ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-0195e9779010.1371/journal.pone.0097790Movements of individual digits in bimanual prehension are coupled into a grasping component.Frank T J M ZaalRaoul M BongersThe classic understanding of prehension is that of coordinated reaching and grasping. An alternative view is that the grasping in prehension emerges from independently controlled individual digit movements (the double-pointing model). The current study tested this latter model in bimanual prehension: participants had to grasp an object between their two index fingers. Right after the start of the movement, the future end position of one of the digits was perturbed. The perturbations resulted in expected changes in the kinematics of the perturbed digit but also in adjusted kinematics in the unperturbed digit. The latter effects showed up when the end position of the right index finger was perturbed, but not when the end position of the left index finger was perturbed. Because the absence of a coupling between the digits is the core assumption of the double-pointing model, finding any perturbation effects challenges this account of prehension; the double-pointing model predicts that the unperturbed digit would be unaffected by the perturbation. The authors conclude that the movement of the digits in prehension is coupled into a grasping component.http://europepmc.org/articles/PMC4037218?pdf=render |
| spellingShingle | Frank T J M Zaal Raoul M Bongers Movements of individual digits in bimanual prehension are coupled into a grasping component. PLoS ONE |
| title | Movements of individual digits in bimanual prehension are coupled into a grasping component. |
| title_full | Movements of individual digits in bimanual prehension are coupled into a grasping component. |
| title_fullStr | Movements of individual digits in bimanual prehension are coupled into a grasping component. |
| title_full_unstemmed | Movements of individual digits in bimanual prehension are coupled into a grasping component. |
| title_short | Movements of individual digits in bimanual prehension are coupled into a grasping component. |
| title_sort | movements of individual digits in bimanual prehension are coupled into a grasping component |
| url | http://europepmc.org/articles/PMC4037218?pdf=render |
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