| Tactile suppression of displacement. | |
| | |
MedLine Citation:
|
PMID: 20842353 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
|
In vision, the discovery of the phenomenon of saccadic suppression of displacement has made important contributions to the understanding of the stable world problem. Here, we report a similar phenomenon in the tactile modality. When scanning a single Braille dot with two fingers of the same hand, participants were asked to decide whether the dot was stationary or whether it was displaced from one location to another. The stimulus was produced by refreshable Braille devices that have dots that can be swiftly raised and recessed. In some conditions, the dot was stationary. In others, a displacement was created by monitoring the participant's finger position and by switching the dot activation when it was not touched by either finger. The dot displacement was of either 2.5 mm or 5 mm. We found that in certain cases, displaced dots were felt to be stationary. If the displacement was orthogonal to the finger movements, tactile suppression occurred effectively when it was of 2.5 mm, but when the displacement was of 5 mm, the participants easily detected it. If the displacement was medial-lateral, the suppression effect occurred as well, but less often when the apparent movement of the dot opposed the movement of the finger. In such cases, the stimulus appeared sooner than when the brain could predict it from finger movement, supporting a predictive rather than a postdictive differential processing hypothesis. |
| | |
Authors:
|
Mounia Ziat; Vincent Hayward; C Elaine Chapman; Marc O Ernst; Charles Lenay |
Related Documents
:
|
2629203 - Acuity for fine-grain motion and for two-dot spacing as a function of retinal eccentric... 12811443 - Early behavior of optokinetic responses elicited by transparent motion stimuli during d... 19565223 - Preparation and inhibition of interceptive actions. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-09-15 |
Journal Detail:
|
Title: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale Volume: 206 ISSN: 1432-1106 ISO Abbreviation: Exp Brain Res Publication Date: 2010 Oct |
Date Detail:
|
Created Date: 2010-09-22 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0043312 Medline TA: Exp Brain Res Country: Germany |
Other Details:
|
Languages: eng Pagination: 299-310 Citation Subset: IM |
Affiliation:
|
Psychology Department, Wilfrid Laurier University, Waterloo, Ontario, Canada. ziatmoun@cim.mcgill.ca |
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: Detection of free radicals by isolated perfusion of the rat brain following hemorrhagic stroke: a no...
Next Document: Benzodiazepine discontinuation among community-dwelling older people: a population-based cohort stud...