Dual-target interference for the ‘automatic pilot’ in the dorsal stream

When a target moves to a new location during a rapid aiming movement, the hand follows it, even when the participant intends not to. Pisella et al. (Nat Neurosci 3:729–736, 2000) claim that the posterior parietal cortex, in the dorsal visual stream, is responsible for this ‘automatic pilot’. Here we study the limits of automaticity in the dorsal stream through analysis of aiming movements to two targets in sequence. Participants were given a goal of moving rapidly to two targets, with the first movement being completed within approximately 200 ms. On 30% of trials, the first or the second target jumped unpredictably to a new location at movement onset, allowing us to measure the automatic capture of the hand. The results showed that hand movements were less responsive to target jumps in a 2-target condition than in a 1-target control condition. This indicates that the ‘automatic pilot’ is susceptible to interference from multiple visual inputs, implying that the dorsal stream is less effective at guiding actions online when multiple targets are attended.

[1]  Mg Fischman,et al.  Slower movement times may not necessarily imply online programming , 1990 .

[2]  Scott T. Grafton,et al.  FEEBACK OR FEEDFORWARD CONTROL : END OF A DICHOTOMY , 2006 .

[3]  C J Chamberlin,et al.  Preparation and control of rapid, multisegmented responses in simple and choice environments. , 1989, Research quarterly for exercise and sport.

[4]  Ian M. Franks,et al.  Response programming as a function of accuracy and complexity: Evidence from latency and kinematic measures , 1997 .

[5]  Jos J. Adam,et al.  Control of rapid aimed hand movement , 2000 .

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

[7]  C. Prablanc,et al.  Large adjustments in visually guided reaching do not depend on vision of the hand or perception of target displacement , 1986, Nature.

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

[9]  Scott H. Johnson-Frey Taking action : cognitive neuroscience perspectives on intentional acts , 2003 .

[10]  Scott T. Grafton,et al.  Forward modeling allows feedback control for fast reaching movements , 2000, Trends in Cognitive Sciences.

[11]  F. M. Henry,et al.  Increased Response Latency for Complicated Movements and A “Memory Drum” Theory of Neuromotor Reaction , 1960 .

[12]  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.

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

[14]  D. Wolpert,et al.  Temporal and amplitude generalization in motor learning. , 1998, Journal of neurophysiology.

[15]  C. Prablanc,et al.  Automatic control during hand reaching at undetected two-dimensional target displacements. , 1992, Journal of neurophysiology.

[16]  James L. Lyons,et al.  The utilization of visual information in the control of rapid sequential aiming movements. , 1999, Acta psychologica.

[17]  Romeo Chua,et al.  No automatic pilot for visually guided aiming based on colour , 2006, Experimental Brain Research.

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

[19]  M. Desmurget,et al.  An ‘automatic pilot’ for the hand in human posterior parietal cortex: toward reinterpreting optic ataxia , 2000, Nature Neuroscience.

[20]  H. Pashler The Psychology of Attention , 1997 .

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