Expert strategy switching in the control of a bimanual manipulandum with an unstable task.
Identifieur interne : 000D17 ( PubMed/Corpus ); précédent : 000D16; suivant : 000D18Expert strategy switching in the control of a bimanual manipulandum with an unstable task.
Auteurs : Jacopo Zenzeri ; Pietro Morasso ; Devjani J. SahaSource :
- Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference [ 1557-170X ] ; 2011.
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Abstract
The goal of this study is to better understand how the central nervous system switches between alternative stabilization strategies when presented with an unstable task. A haptic, bimanual manipulandum has been used to emulate an unstable task, which requires subjects to stabilize a virtual mass under the action of a saddle force field with two nonlinear springs, whose stiffness increases with the amount of stretch. Subjects learn to position the mass at various target points by adjusting the rest length, and thus the stiffness of the two springs. From a previous study we know that subjects can stabilize the mass by either 1) applying large forces to stretch the springs and increase the mechanical stiffness of the system beyond a critical level or by 2) applying small force impulses that intermittently adjust the position of the mass. In this study we report the performance of a subject who was trained extensively to use one strategy or the other in order to characterize the mechanism of target switching, from the high-stiffness to the low-stiffness regime and back.
DOI: 10.1109/IEMBS.2011.6090850
PubMed: 22254999
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Saha</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2011">2011</date><idno type="doi">10.1109/IEMBS.2011.6090850</idno><idno type="RBID">pubmed:22254999</idno><idno type="pmid">22254999</idno><idno type="wicri:Area/PubMed/Corpus">000D17</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Expert strategy switching in the control of a bimanual manipulandum with an unstable task.</title><author><name sortKey="Zenzeri, Jacopo" sort="Zenzeri, Jacopo" uniqKey="Zenzeri J" first="Jacopo" last="Zenzeri">Jacopo Zenzeri</name><affiliation><nlm:affiliation>Italian Institute of Technology, Dept of Robotics, Brain and Cognitive Sciences, 16163 Genoa, Italy. jacopo.zenzeri@iit.it</nlm:affiliation></affiliation></author><author><name sortKey="Morasso, Pietro" sort="Morasso, Pietro" uniqKey="Morasso P" first="Pietro" last="Morasso">Pietro Morasso</name></author><author><name sortKey="Saha, Devjani J" sort="Saha, Devjani J" uniqKey="Saha D" first="Devjani J" last="Saha">Devjani J. Saha</name></author></analytic><series><title level="j">Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference</title><idno type="ISSN">1557-170X</idno><imprint><date when="2011" type="published">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Task Performance and Analysis</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Task Performance and Analysis</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The goal of this study is to better understand how the central nervous system switches between alternative stabilization strategies when presented with an unstable task. A haptic, bimanual manipulandum has been used to emulate an unstable task, which requires subjects to stabilize a virtual mass under the action of a saddle force field with two nonlinear springs, whose stiffness increases with the amount of stretch. Subjects learn to position the mass at various target points by adjusting the rest length, and thus the stiffness of the two springs. From a previous study we know that subjects can stabilize the mass by either 1) applying large forces to stretch the springs and increase the mechanical stiffness of the system beyond a critical level or by 2) applying small force impulses that intermittently adjust the position of the mass. In this study we report the performance of a subject who was trained extensively to use one strategy or the other in order to characterize the mechanism of target switching, from the high-stiffness to the low-stiffness regime and back.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">22254999</PMID><DateCreated><Year>2012</Year><Month>01</Month><Day>18</Day></DateCreated><DateCompleted><Year>2012</Year><Month>06</Month><Day>20</Day></DateCompleted><DateRevised><Year>2014</Year><Month>08</Month><Day>21</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">1557-170X</ISSN><JournalIssue CitedMedium="Internet"><Volume>2011</Volume><PubDate><Year>2011</Year></PubDate></JournalIssue><Title>Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. 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From a previous study we know that subjects can stabilize the mass by either 1) applying large forces to stretch the springs and increase the mechanical stiffness of the system beyond a critical level or by 2) applying small force impulses that intermittently adjust the position of the mass. In this study we report the performance of a subject who was trained extensively to use one strategy or the other in order to characterize the mechanism of target switching, from the high-stiffness to the low-stiffness regime and back.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Zenzeri</LastName><ForeName>Jacopo</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Italian Institute of Technology, Dept of Robotics, Brain and Cognitive Sciences, 16163 Genoa, Italy. jacopo.zenzeri@iit.it</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Morasso</LastName><ForeName>Pietro</ForeName><Initials>P</Initials></Author><Author ValidYN="Y"><LastName>Saha</LastName><ForeName>Devjani J</ForeName><Initials>DJ</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Conf Proc IEEE Eng Med Biol Soc</MedlineTA><NlmUniqueID>101243413</NlmUniqueID><ISSNLinking>1557-170X</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName MajorTopicYN="Y" UI="D013647">Task Performance and Analysis</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2012</Year><Month>1</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2012</Year><Month>1</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2012</Year><Month>6</Month><Day>21</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1109/IEMBS.2011.6090850</ArticleId><ArticleId IdType="pubmed">22254999</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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