title: Spatiotemporal integration for tactile localization during arm movements: a probabilistic approach.
abstract: It has been shown that people make systematic errors in the localization of a brief tactile stimulus that is delivered to the index finger while they are making an arm movement. Here we modeled these spatial errors with a probabilistic approach, assuming that they follow from temporal uncertainty about the occurrence of the stimulus. In the model, this temporal uncertainty converts into a spatial likelihood about the external stimulus location, depending on arm velocity. We tested the prediction of the model that the localization errors depend on arm velocity. Participants (n = 8) were instructed to localize a tactile stimulus that was presented to their index finger while they were making either slow- or fast-targeted arm movements. Our results confirm the model's prediction that participants make larger localization errors when making faster arm movements. The model, which was used to fit the errors for both slow and fast arm movements simultaneously, accounted very well for all the characteristics of these data with temporal uncertainty in stimulus processing as the only free parameter. We conclude that spatial errors in dynamic tactile perception stem from the temporal precision with which tactile inputs are processed.
authors: Radboud University Nijmegen, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; and.
authors: Femke
authors: F
authors: Maij
authors: Alan M
authors: AM
authors: Wing
authors: W Pieter
authors: WP
authors: Medendorp
mesh_terms: D000328:Adult; D001132:Arm / Q000294:innervation / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008959:Models, Neurological; D009068:Movement; D014110:Touch; D055698:Touch Perception; D035501:Uncertainty
keywords: haptics; human; mislocalization; movement; perception
references: Somatosens Mot Res. 2003;20(1):33-43
references: 12745443
references: Curr Biol. 2008 Jul 22;18(14):1044-9
references: 18619841
references: Exp Brain Res. 1998 Oct;122(4):367-77
references: 9827856
references: J Neurophysiol. 2009 Jul;102(1):490-5
references: 19439670
references: J Vis. 2010 Dec 16;10(14):17
references: 21163956
references: Vision Res. 1995 Aug;35(16):2347-57
references: 7571470
references: Science. 1965 Jun 11;148(3676):1485-8
references: 17738160
references: J Neurosci. 1985 Jul;5(7):1688-703
references: 4020415
references: Vis Neurosci. 1992 Sep-Oct;9(3-4):261-9
references: 1390386
references: Vision Res. 2007 Sep;47(21):2798-813
references: 17767942
references: Behav Brain Res. 2010 Apr 2;208(2):391-401
references: 20018212
references: Exp Brain Res. 2011 Sep;213(2-3):223-7
references: 21516332
references: Percept Psychophys. 1989 Feb;45(2):162-74
references: 2928078
references: J Neurosci. 2007 Jul 11;27(28):7559-63
references: 17626217
references: J Neurophysiol. 1996 Aug;76(2):1310-26
references: 8871238
references: Proc Biol Sci. 2006 Sep 7;273(1598):2159-68
references: 16901835
references: Trends Neurosci. 2001 Feb;24(2):113-21
references: 11164942
references: Percept Psychophys. 1999 May;61(4):591-607
references: 10370330
references: PLoS Comput Biol. 2008 Feb;4(2):e31
references: 18282086
references: J Neurosci. 2011 Mar 9;31(10):3708-11
references: 21389225
references: J Vis. 2008 Feb 21;8(2):7.1-10
references: 18318633
references: Trends Neurosci. 2004 Dec;27(12):712-9
references: 15541511
references: J Cogn Neurosci. 2010 Jan;22(1):184-202
references: 19199399
references: Cereb Cortex. 1997 Sep;7(6):487-501
references: 9276174
references: Exp Brain Res. 2009 Mar;193(3):483-9
references: 19198817
references: Vision Res. 2012 May 1;60:22-7
references: 22446107
references: Percept Psychophys. 1978 Sep;24(3):215-24
references: 704282
references: J Physiol. 1988 Oct;404:157-82
references: 3253429
references: Cereb Cortex. 2005 Apr;15(4):431-47
references: 15749987
references: Exp Brain Res. 1995;106(3):434-48
references: 8983987
references: Vision Res. 2004 Nov;44(24):2799-813
references: 15342224
references: Nature. 2000 Feb 24;403(6772):892-5
references: 10706286
references: Spat Vis. 1997;10(4):433-6
references: 9176952
references: Nature. 1997 Apr 10;386(6625):598-601
references: 9121581
references: J Neurosci. 2012 Oct 31;32(44):15309-17
references: 23115169
references: Vision Res. 2001 Nov;41(24):3163-83
references: 11711141
references: J Exp Psychol Hum Percept Perform. 2006 Aug;32(4):811-25
references: 16846281