%0 Journal Article %1 Desmurget:2005 %A Desmurget, Michel %A Turner, Robert S. %A Prablanc, Claude %A Grafton, Scott T. %D 2005 %J Journal of Experimental Psychology: Human Perception and Performance %K control, coordination, eye–hand feedback, forward model online reaching, %N 6 %P 1510–1536 %T Updating Target Location at the End of an Orienting Saccade Affects the Characteristics of Simple Point-to-Point Movements %V 31 %X Six results are reported. (a) Reaching accuracy increases when visual capture of the target is allowed (e.g., target on vs. target off at saccade onset). (b) Whatever the visual condition, trajectories diverge only after peak acceleration, suggesting that accuracy is improved through feedback mechanisms. (c) Feedback corrections are smoothly implemented, causing the corrected and uncorrected velocity profiles to exhibit similar shapes. (d) Initial kinematics poorly predict final accuracy whatever the condition, indicating that target capture is not the only critical input for feedback control. (e) Hand and eye final variability are unrelated, suggesting that gaze direction is not a target signal for arm control. (f) Extent errors are corrected without modification of movement straightness; direction errors cause path curvature to increase. Together these data show that movements with straight paths and bell-shaped velocity profiles are not necessarily ballistic.

@article{Desmurget:2005, abstract = {Six results are reported. (a) Reaching accuracy increases when visual capture of the target is allowed (e.g., target on vs. target off at saccade onset). (b) Whatever the visual condition, trajectories diverge only after peak acceleration, suggesting that accuracy is improved through feedback mechanisms. (c) Feedback corrections are smoothly implemented, causing the corrected and uncorrected velocity profiles to exhibit similar shapes. (d) Initial kinematics poorly predict final accuracy whatever the condition, indicating that target capture is not the only critical input for feedback control. (e) Hand and eye final variability are unrelated, suggesting that gaze direction is not a target signal for arm control. (f) Extent errors are corrected without modification of movement straightness; direction errors cause path curvature to increase. Together these data show that movements with straight paths and bell-shaped velocity profiles are not necessarily ballistic.}, added-at = {2009-06-26T15:25:19.000+0200}, author = {Desmurget, Michel and Turner, Robert S. and Prablanc, Claude and Grafton, Scott T.}, biburl = {https://www.bibsonomy.org/bibtex/2082c30bb525a217481d59c3b2f2db3d5/butz}, comment = {Closed-Loop-Controlle ist auch für Bewegungen relevant, die ein bellshaped velocityprofile haben. Experiment 1: Armbewegung zu ziel mit Entweder: UV1: Saccade oder nicht oder UV2: Target wird nach beginn der Saccade, nach Beginn der Handbewegung oder nach der Handbewegung ausgeblendet. Constrained 2d-movement: Hinweise auf Korrektur der BEwegung durch genaues Fovealisieren des Targets (Arm unsichtbar) Experiment 2: freie Armbewegung mit Saccade zu Target (eingeblendet bis ende der Handbewegung oder Anfang der Saccade) Armtrajektorien unterscheiden sich signbifikant ab ca 270 ms, obwohl beide gleich beginnen. Armbewegeung wird in richtung des Targets umgelenkt, wenn Target bestehen bleibt -> Schlussfolgerung: Auch Bewegungen die als einfach Feedforward angenommen werden, z.B. wegen Bellshaped vel Profileunterliegen closedloop control.}, description = {diverse cognitive systems bib}, interhash = {a4ef2549285cee92e5c4876e2d6c902c}, intrahash = {082c30bb525a217481d59c3b2f2db3d5}, journal = {Journal of Experimental Psychology: Human Perception and Performance}, keywords = {control, coordination, eye–hand feedback, forward model online reaching,}, number = 6, owner = {martin}, pages = { 1510–1536}, timestamp = {2009-06-26T15:25:27.000+0200}, title = {Updating Target Location at the End of an Orienting Saccade Affects the Characteristics of Simple Point-to-Point Movements}, volume = 31, year = 2005 }