The impact of real and illusory target perturbations on manual aiming

This experiment was designed to determine if real and illusory shifts in target position at movement initiation affect the same online corrective processes. Adult participants completed rapid goal-directed movements toward the vertex of a target “T” located at the midline, 25 cm distal to a small home position. At movement initiation, the target either stayed the same, shifted its real position, its illusory position or both. The real perturbation involved a 2.5 mm shift either toward or away from the body. For the illusory perturbation, the horizontal portion of the “T” changed to inward or outward Müller–Lyer wings. Both the real and the illusory perturbation affected movement outcome. The two manipulations began to have their impact at peak velocity. Because both perturbations affected mid to late trajectory control and because their effects were not independent, we concluded that real and illusory target shifts impact late visual motor control associated with a comparison between the position of the limb and the perceived position of the target.

[1]  Saul Sternberg,et al.  The discovery of processing stages: Extensions of Donders' method , 1969 .

[2]  L. M. Ward,et al.  The effect of optical blur on visual-geometric illusions , 1978 .

[3]  M. Goodale,et al.  Visual control of reaching movements without vision of the limb , 2004, Experimental Brain Research.

[4]  Reza Shadmehr,et al.  On-Line Processing of Uncertain Information in Visuomotor Control , 2008, The Journal of Neuroscience.

[5]  Scott T. Grafton,et al.  Role of the posterior parietal cortex in updating reaching movements to a visual target , 1999, Nature Neuroscience.

[6]  P. Fitts.  The information capacity of the human motor system in controlling the amplitude of movement. , 1954, Journal of experimental psychology.

[7]  Steve Hansen,et al.  Visual illusions affect both movement planning and on-line control: a multiple cue position on bias and goal-directed action. , 2005, Human movement science.

[8]  D. Elliott,et al.  The Utilization of Visual Feedback Information during Rapid Pointing Movements , 1985, The Quarterly journal of experimental psychology. A, Human experimental psychology.

[9]  Lawrence E M Grierson,et al.  Goal-directed aiming and the relative contribution of two online control processes. , 2009, The American journal of psychology.

[10]  Luc Tremblay,et al.  The Müller-Lyer illusion affects the planning and control of manual aiming movements , 2004, Experimental Brain Research.

[11]  M. Goodale,et al.  An evolving view of duplex vision: separate but interacting cortical pathways for perception and action , 2004, Current Opinion in Neurobiology.

[12]  Digby Elliott,et al.  Vision and motor control , 1992 .

[13]  G. Fullerton.  Psychology and physiology. , 1896 .

[14]  D. Elliott,et al.  Three-Dimensional Manual Responses to Unexpected Target Perturbations During Rapid Aiming , 2009, Journal of motor behavior.

[15]  Digby Elliott,et al.  The effect of the Müller-Lyer illusion on the planning and control of manual aiming movements. , 2006, Journal of experimental psychology. Human perception and performance.

[16]  M. Goodale,et al.  Perceptual illusion and the real-time control of action. , 2003, Spatial vision.

[17]  W. Helsen,et al.  A century later: Woodworth's (1899) two-component model of goal-directed aiming. , 2001, Psychological bulletin.

[18]  Maurizio Gentilucci,et al.  Visually guided pointing, the Müller-Lyer illusion, and the functional interpretation of the dorsal-ventral split: Conclusions from 33 independent studies , 2008, Neuroscience & Biobehavioral Reviews.

[19]  D. Elliott,et al.  The role of target information on manual-aiming bias , 1995, Psychological Research.

[20]  M. Goodale,et al.  The visual brain in action , 1995 .

[21]  Digby Elliott,et al.  Perception-action and the Müller-Lyer illusion: amplitude or endpoint bias? , 2004, Experimental Brain Research.

[22]  Lawrence E. M. Grierson,et al.  Kinematic analysis of goal-directed aims made against early and late perturbations: an investigation of the relative influence of two online control processes. , 2008, Human movement science.

[23]  Les G. Carlton,et al.  Chapter 1 Visual Processing Time and the Control of Movement , 1992 .

[24]  Robert Sessions Woodworth,et al.  THE ACCURACY OF VOLUNTARY MOVEMENT , 1899 .

[25]  M. Goodale,et al.  Visual control of reaching movements without vision of the limb , 1986, Experimental Brain Research.

[26]  Luc Tremblay,et al.  Online Control of Discrete Action following Visual Perturbation , 2007, Perception.

[27]  Steve Hansen,et al.  Optimising speed and energy expenditure in accurate visually directed upper limb movements , 2009, Ergonomics.

[28]  P. Fitts,et al.  INFORMATION CAPACITY OF DISCRETE MOTOR RESPONSES. , 1964, Journal of experimental psychology.

[29]  R A Abrams,et al.  Optimality in human motor performance: ideal control of rapid aimed movements. , 1988, Psychological review.

[30]  M. Jeannerod,et al.  Selective perturbation of visual input during prehension movements , 1991, Experimental Brain Research.

[31]  Romeo Chua,et al.  On-line control of rapid aiming movements: Unexpected target perturbations and movement kinematics. , 1998 .