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Fast and accurate edge orientation processing during object manipulation
Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB). Department of Physiology and Pharmacology; Department of Psychology; Robarts Research Institute; Brain and Mind Institute, Western University, London, Canada.
Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB).ORCID iD: 0000-0003-3288-8326
2018 (English)In: eLIFE, E-ISSN 2050-084X, Vol. 7, article id e31200Article in journal (Refereed) Published
Abstract [en]

Quickly and accurately extracting information about a touched object’s orientation is a critical aspect of dexterous object manipulation. However, the speed and acuity of tactile edge orientation processing with respect to the fingertips as reported in previous perceptual studies appear inadequate in these respects. Here we directly establish the tactile system’s capacity to process edge-orientation information during dexterous manipulation. Participants extracted tactile information about edge orientation very quickly, using it within 200 ms of first touching the object. Participants were also strikingly accurate. With edges spanning the entire fingertip, edge-orientation resolution was better than 3° in our object manipulation task, which is several times better than reported in previous perceptual studies. Performance remained impressive even with edges as short as 2 mm, consistent with our ability to precisely manipulate very small objects. Taken together, our results radically redefine the spatial processing capacity of the tactile system.

Place, publisher, year, edition, pages
ELIFE SCIENCES PUBLICATIONS LTD , 2018. Vol. 7, article id e31200
National Category
Physiology
Identifiers
URN: urn:nbn:se:umu:diva-151176DOI: 10.7554/eLife.31200ISI: 000431038000001PubMedID: 29611804Scopus ID: 2-s2.0-85051947543OAI: oai:DiVA.org:umu-151176DiVA, id: diva2:1245576
Available from: 2018-09-05 Created: 2018-09-05 Last updated: 2018-09-05Bibliographically approved

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Pruszynski, J. AndrewJohansson, Roland S.

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