| Contact points during multidigit grasping of geometric objects. | |
| | |
MedLine Citation:
|
PMID: 22198529 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
We investigated the choice of contact points during multidigit grasping of different objects. In Experiment 1, cylinders were grasped and lifted. Participants were either instructed as to the number of fingers they should use, ranging from a two-finger grasp to a five-finger grasp, or could grasp with their preferred number of fingers. We found a strong relationship between the position of the fingertips on the object and the number of fingers used. In general, variability in the choice of contact points was low within- as well as between participants. The virtual finger, defined as the geometric mean position of fingers opposing the thumb, was in almost perfect opposition to the thumb, suggesting the formation of a functional unit using all contributing fingers in the grasp. In Experiment 2, four more complex shapes (rectangle, hexagon, pentagon, curved object) were grasped. Although we found some moderate between-participant variability in the choice of contact points, the within-participant variability was again remarkably low. In both experiments, participants showed a strong preference to use four or five fingers during grasping when left with free choice. Taken together, our findings suggest a preplanning of the grasping movement and that grasping results from a coordinated interplay between the fingers contributing to the grasp that cannot be understood as independent digit movements. |
| | |
Authors:
|
René Gilster; Constanze Hesse; Heiner Deubel |
Related Documents
:
|
17566069 - A new method for wide frequency range dynamic olfactory stimulation and characterization. 21823949 - Influence of curbs on traffic crash frequency on high-speed roadways. 19439839 - Neurology of acute organophosphate poisoning. 10980029 - Representation of the temporal envelope of sounds in the human brain. 12381819 - Frequency-dependent shift from paired-pulse facilitation to paired-pulse depression at ... 2147179 - Effects of continuous low-frequency pacing on immature canine diaphragm. 19045809 - Speech production modifications produced by competing talkers, babble, and stationary n... 15000139 - High performance force feedback mechanism for virtual reality training of endotracheal ... 20676369 - Light perception in two strictly subterranean rodents: life in the dark or blue? |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-12-24 |
Journal Detail:
|
Title: Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale Volume: - ISSN: 1432-1106 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
|
Created Date: 2011-12-26 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0043312 Medline TA: Exp Brain Res Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
General and Experimental Psychology, Ludwig-Maximilians-University, Leopoldstr. 13, 80802, Munich, Germany, rene.gilster@psy.lmu.de. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: High prevalence of radiological vertebral fractures in HIV-infected males.
Next Document: Imperceptible electrical noise attenuates isometric plantar flexion force fluctuations with correlat...