KOPS - The Institutional Repository of the University of Konstanz

Anticipatory scaling of grip forces when lifting objects of everyday life

Anticipatory scaling of grip forces when lifting objects of everyday life

Cite This

Files in this item

Files Size Format View

There are no files associated with this item.

HERMSDÖRFER, Joachim, Yong LI, Jennifer RANDERATH, Georg GOLDENBERG, Sandra EIDENMÜLLER, 2011. Anticipatory scaling of grip forces when lifting objects of everyday life. In: Experimental Brain Research. 212(1), pp. 19-31. ISSN 0014-4819. eISSN 1432-1106. Available under: doi: 10.1007/s00221-011-2695-y

@article{Hermsdorfer2011-07Antic-41391, title={Anticipatory scaling of grip forces when lifting objects of everyday life}, year={2011}, doi={10.1007/s00221-011-2695-y}, number={1}, volume={212}, issn={0014-4819}, journal={Experimental Brain Research}, pages={19--31}, author={Hermsdörfer, Joachim and Li, Yong and Randerath, Jennifer and Goldenberg, Georg and Eidenmüller, Sandra} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/41391"> <dc:creator>Randerath, Jennifer</dc:creator> <dcterms:abstract xml:lang="eng">The ability to predict and anticipate the mechanical demands of the environment promotes smooth and skillful motor actions. Thus, the finger forces produced to grasp and lift an object are scaled to the physical properties such as weight. While grip force scaling is well established for neutral objects, only few studies analyzed objects known from daily routine and none studied grip forces. In the present study, eleven healthy subjects each lifted twelve objects of everyday life that encompassed a wide range of weights. The finger pads were covered with force sensors that enabled the measurement of grip force. A scale registered load forces. In a control experiment, the objects were wrapped into paper to prevent recognition by the subjects. Data from the first lift of each object confirmed that object weight was anticipated by adequately scaled forces. The maximum grip force rate during the force increase phase emerged as the most reliable measure to verify that weight was actually predicted and to characterize the precision of this prediction, while other force measures were scaled to object weight also when object identity was not known. Variability and linearity of the grip force-weight relationship improved for time points reached after liftoff, suggesting that sensory information refined the force adjustment. The same mechanism seemed to be involved with unrecognizable objects, though a lower precision was reached. Repeated lifting of the same object within a second and third presentation block did not improve the precision of the grip force scaling. Either practice was too variable or the motor system does not prioritize the optimization of the internal representation when objects are highly familiar.</dcterms:abstract> <dc:contributor>Eidenmüller, Sandra</dc:contributor> <dc:contributor>Li, Yong</dc:contributor> <dc:creator>Li, Yong</dc:creator> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/41391"/> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-02-16T08:22:54Z</dcterms:available> <dc:creator>Goldenberg, Georg</dc:creator> <dcterms:title>Anticipatory scaling of grip forces when lifting objects of everyday life</dcterms:title> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-02-16T08:22:54Z</dc:date> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/43"/> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:language>eng</dc:language> <dc:contributor>Hermsdörfer, Joachim</dc:contributor> <dc:contributor>Randerath, Jennifer</dc:contributor> <dc:creator>Eidenmüller, Sandra</dc:creator> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/43"/> <dc:contributor>Goldenberg, Georg</dc:contributor> <dcterms:issued>2011-07</dcterms:issued> <dc:creator>Hermsdörfer, Joachim</dc:creator> </rdf:Description> </rdf:RDF>

This item appears in the following Collection(s)

Search KOPS


My Account