caa a22 4500 445353481 CHVBK 20180317142852.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s00221-011-2704-1 doi (NATIONALLICENCE)springer-10.1007/s00221-011-2704-1 The effects of task and content on digit placement on a bottle [Elektronische Daten] [Céline Crajé, Jamie Lukos, Caterina Ansuini, Andrew Gordon, Marco Santello] In addition to hand shaping, previous studies have shown that subjects adapt placement of individual digits to object properties such as its weight and center of mass. However, the extent to which digit placement varies based on task context is unknown. In the present study, we investigated where subjects place their digits on a bottle when the upcoming task (lift versus pour) and object content (i.e., amount of liquid: empty, half, and full) were manipulated. Our results showed that subjects anticipated both the upcoming task and content by varying digit placement when grasping the bottle prior to the onset of manipulation. Specifically, subjects increased the vertical distance between the thumb and index finger for pouring but not for lifting. This larger moment arm might have been established to decrease the amount of force required to tilt the bottle. Content also affected digit placement: the digits were placed higher and were wrapped more around the bottle with increasing content. This strategy may maximize grip surface contact, and hence grasp stability. These findings extend previous research showing that grasp planning not only takes place at a macroscopic level (whole-hand position relative to an object), but also at the level of individual digit placement. This finer level of control appears to be sensitive to the expected mechanical properties of the object and how these may affect grasp stability throughout the upcoming manipulation. Springer-Verlag, 2011 Motor control nationallicence Hand nationallicence Planning nationallicence Grasping nationallicence Crajé Céline Department of Biobehavioral Sciences, Teachers College, Columbia University, 525 West 120th street, box 93, 10027, New York, NY, USA aut Lukos Jamie Institute for Neural Computation, University of California, San Diego, CA, USA aut Ansuini Caterina Dipartimento di Psicologia Generale, Università di Padova, 35131, Padova, Italy aut Gordon Andrew Department of Biobehavioral Sciences, Teachers College, Columbia University, 525 West 120th street, box 93, 10027, New York, NY, USA aut Santello Marco School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA aut Experimental Brain Research Springer-Verlag 212/1(2011-07-01), 119-124 0014-4819 212:1<119 2011 212 221 https://doi.org/10.1007/s00221-011-2704-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-011-2704-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Crajé Céline Department of Biobehavioral Sciences, Teachers College, Columbia University, 525 West 120th street, box 93, 10027, New York, NY, USA aut NATIONALLICENCE 700 1- Lukos Jamie Institute for Neural Computation, University of California, San Diego, CA, USA aut NATIONALLICENCE 700 1- Ansuini Caterina Dipartimento di Psicologia Generale, Università di Padova, 35131, Padova, Italy aut NATIONALLICENCE 700 1- Gordon Andrew Department of Biobehavioral Sciences, Teachers College, Columbia University, 525 West 120th street, box 93, 10027, New York, NY, USA aut NATIONALLICENCE 700 1- Santello Marco School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 212/1(2011-07-01), 119-124 0014-4819 212:1<119 2011 212 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer