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Online corrections can produce illusory bias during closed-loop pointing.
Exp Brain Res. 2008 Jul; 188(3):371-8.EB

Abstract

This experiment examined whether the impact of pictorial illusions during the execution of goal-directed reaching movements is attributable to ocular motor signaling. We analyzed eye and hand movements directed toward both the vertex of the Müller-Lyer (ML) figure in a closed-loop procedure. Participants pointed to the right vertex of a visual stimulus in two conditions: a control condition wherein the figure (in-ML, neutral, out-ML) presented at response planning remained unchanged throughout the movement, and an experimental condition wherein a neutral figure presented at response planning was perturbed to an illusory figure (in-ML, out-ML) at movement onset. Consistent with previous work from our group (Heath et al. in Exp Brain Res 158:378-384, 2004; Heath et al. in J Mot Behav 37:179-185, 2005b), action-bias present in both conditions; thus illusory bias was introduced into during online control. Although primary saccades were influenced by illusory configurations (control conditions; see Binsted and Elliott in Hum Mov Sci 18:103-117, 1999a), illusory bias developed within the secondary "corrective" saccades during experimental trials (i.e., following a veridical primary saccade). These results support the position that a unitary spatial representation underlies both action and perception and this representation is common to both the manual and oculomotor systems.

Authors+Show Affiliations

Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, AB, Canada. deborah.saucier@uleth.caNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18427794

Citation

Ehresman, C, et al. "Online Corrections Can Produce Illusory Bias During Closed-loop Pointing." Experimental Brain Research, vol. 188, no. 3, 2008, pp. 371-8.
Ehresman C, Saucier D, Heath M, et al. Online corrections can produce illusory bias during closed-loop pointing. Exp Brain Res. 2008;188(3):371-8.
Ehresman, C., Saucier, D., Heath, M., & Binsted, G. (2008). Online corrections can produce illusory bias during closed-loop pointing. Experimental Brain Research, 188(3), 371-8. https://doi.org/10.1007/s00221-008-1367-z
Ehresman C, et al. Online Corrections Can Produce Illusory Bias During Closed-loop Pointing. Exp Brain Res. 2008;188(3):371-8. PubMed PMID: 18427794.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Online corrections can produce illusory bias during closed-loop pointing. AU - Ehresman,C, AU - Saucier,D, AU - Heath,M, AU - Binsted,G, Y1 - 2008/04/22/ PY - 2007/09/11/received PY - 2008/04/01/accepted PY - 2008/4/23/pubmed PY - 2008/8/21/medline PY - 2008/4/23/entrez SP - 371 EP - 8 JF - Experimental brain research JO - Exp Brain Res VL - 188 IS - 3 N2 - This experiment examined whether the impact of pictorial illusions during the execution of goal-directed reaching movements is attributable to ocular motor signaling. We analyzed eye and hand movements directed toward both the vertex of the Müller-Lyer (ML) figure in a closed-loop procedure. Participants pointed to the right vertex of a visual stimulus in two conditions: a control condition wherein the figure (in-ML, neutral, out-ML) presented at response planning remained unchanged throughout the movement, and an experimental condition wherein a neutral figure presented at response planning was perturbed to an illusory figure (in-ML, out-ML) at movement onset. Consistent with previous work from our group (Heath et al. in Exp Brain Res 158:378-384, 2004; Heath et al. in J Mot Behav 37:179-185, 2005b), action-bias present in both conditions; thus illusory bias was introduced into during online control. Although primary saccades were influenced by illusory configurations (control conditions; see Binsted and Elliott in Hum Mov Sci 18:103-117, 1999a), illusory bias developed within the secondary "corrective" saccades during experimental trials (i.e., following a veridical primary saccade). These results support the position that a unitary spatial representation underlies both action and perception and this representation is common to both the manual and oculomotor systems. SN - 1432-1106 UR - https://www.unboundmedicine.com/medline/citation/18427794/Online_corrections_can_produce_illusory_bias_during_closed_loop_pointing_ L2 - https://dx.doi.org/10.1007/s00221-008-1367-z DB - PRIME DP - Unbound Medicine ER -