A clearly visible endoscopic instrument shaft on the monitor facilitates hand–eye coordination

Wentink, M.; Breedveld, Paul; Stassen, Laurents P. S.; Oei, I. Hok; Wieringa, P.A.

doi:10.1007/s00464-001-9214-3

Cited by 17 publications

(13 citation statements)

References 11 publications

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“…These results replicate and extend Wndings of previous studies showing that a visible lever arm boosts closedloop performance (Heuer and Hegele 2010;Wentink et al 2002). However, Danziger and Mussa-Ivaldi (2010) found that adding the segments of a simulated arm to pure cursor feedback served to increase curvature rather than to reduce it, which is quite the opposite of what we found for adding the lever segment to pure cursor feedback.…”

Section: Discussionsupporting

confidence: 85%

“…Previous research has shown that providing information about the orientation of the tip of the instrumentand therefore enhancing mechanical transparencyimproves performance in tasks performed with a minimally invasive simulator (Wentink et al 2002). Heuer and Hegele (2010) investigated the impact of increased mechanical transparency on the mastery of the visuomotor transformation of a virtual two-sided lever.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced mechanical transparency during practice impedes open-loop control of a complex tool

Sülzenbrück

Heuer

2012

Exp Brain Res

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We investigated the impact of enhanced mechanical transparency during practice on closed-loop performance as well as on the acquisition of an internal representation of the visuo-motor transformation of a lever. Three groups of participants controlled a cursor on a monitor by moving the effort arm of a sliding two-sided lever. The level of mechanical transparency was manipulated by varying the amount of conceptual knowledge about the tool the participants were using as well as by the visualization of the effective part of the tool on the monitor. While for groups cursor- and cursor+ only a cursor representing the tip of the load arm of the lever was visible, group shaft was additionally provided with a representation of the load arm on the monitor. The cursor groups differed in conceptual knowledge about the tool, with only group cursor+ being informed that they were controlling a two-sided lever. Enhanced mechanical transparency, resulting from the visibility of the lever arm, boosted performance in terms of faster and straighter movements when concurrent visual feedback was available, and therefore closed-loop control was possible. In contrast, a detrimental effect of enhanced mechanical transparency during practice on the accuracy of the internal representation of the visuo-motor transformation was observed. When assessing open-loop control in test trials without visual feedback, participants who had previously practiced the tool transformation with the visible lever arm showed larger end point errors than those who had practiced with the cursor only. These findings support the notion that enhanced mechanical transparency of a tool is a type of environmental support which boosts closed-loop performance, but impedes open-loop performance, most likely by serving as a substitute for an internal representation. When practice conditions facilitate closed-loop control, the acquisition of an accurate internal representation of a novel visuo-motor transformation seems to be hampered.

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Section: Discussionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical transparency during practice impedes open-loop control of a complex tool

Sülzenbrück

Heuer

2012

Exp Brain Res

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“…2. Even though our aiming movements were simpler than the task of Wentink et al (2002), we observed faster movement times when the load arm was visible than in the control group, more so in the older than in the young participants. Heuer and Sülzenbrück 2009) is absent, but the relation between the movement of the finger and the motion of the cursor on the monitor is the same as if the motion of the cursor would correspond to the motion of the tip of a sliding lever.…”

Section: The Robustness Of Age-related Variationscontrasting

confidence: 57%

Age-Differentiated Work Systems

Schlick

2013

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“…Technical solutions for the compensation of planar misorientation are still in the process of being enhanced and validated [45]–[47]. As such, planar misorientation results in increased navigational difficulties and execution time for laparoscopic surgeons [48].…”

Section: Discussionmentioning

confidence: 99%

Eye-Hand Coordination during Dynamic Visuomotor Rotations

et al. 2009

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Backgroundfor many technology-driven visuomotor tasks such as tele-surgery, human operators face situations in which the frames of reference for vision and action are misaligned and need to be compensated in order to perform the tasks with the necessary precision. The cognitive mechanisms for the selection of appropriate frames of reference are still not fully understood. This study investigated the effect of changing visual and kinesthetic frames of reference during wrist pointing, simulating activities typical for tele-operations.Methodsusing a robotic manipulandum, subjects had to perform center-out pointing movements to visual targets presented on a computer screen, by coordinating wrist flexion/extension with abduction/adduction. We compared movements in which the frames of reference were aligned (unperturbed condition) with movements performed under different combinations of visual/kinesthetic dynamic perturbations. The visual frame of reference was centered to the computer screen, while the kinesthetic frame was centered around the wrist joint. Both frames changed their orientation dynamically (angular velocity = 36°/s) with respect to the head-centered frame of reference (the eyes). Perturbations were either unimodal (visual or kinesthetic), or bimodal (visual+kinesthetic). As expected, pointing performance was best in the unperturbed condition. The spatial pointing error dramatically worsened during both unimodal and most bimodal conditions. However, in the bimodal condition, in which both disturbances were in phase, adaptation was very fast and kinematic performance indicators approached the values of the unperturbed condition.Conclusionsthis result suggests that subjects learned to exploit an “affordance” made available by the invariant phase relation between the visual and kinesthetic frames. It seems that after detecting such invariance, subjects used the kinesthetic input as an informative signal rather than a disturbance, in order to compensate the visual rotation without going through the lengthy process of building an internal adaptation model. Practical implications are discussed as regards the design of advanced, high-performance man-machine interfaces.

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A clearly visible endoscopic instrument shaft on the monitor facilitates hand–eye coordination

Abstract: Compensating for the kinematic effects introduced by the incision improves hand-eye coordination. The results of this study indicate that the incision provides a point of reference for hand-eye coordination during endoscopic manipulation.

Cited by 17 publications

References 11 publications

Enhanced mechanical transparency during practice impedes open-loop control of a complex tool

Enhanced mechanical transparency during practice impedes open-loop control of a complex tool

Age-Differentiated Work Systems

Eye-Hand Coordination during Dynamic Visuomotor Rotations

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