Planning macroscopic aspects of manual control: End-state comfort and point-of-change effects

Short, Martin W.; Cauraugh, James H.

doi:10.1016/s0001-6918(97)00006-1

Cited by 59 publications

(39 citation statements)

References 14 publications

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“…comfort effect" (Rosenbaum et al, 1992;Short and Cauraugh, 1997;Cohen and Rosenbaum, 2004). Our results extend these observations in a number of ways.…”

supporting

confidence: 82%

Choice of Contact Points during Multidigit Grasping: Effect of Predictability of Object Center of Mass Location

Lukos¹,

Ansuini²,

Santello³

2007

J. Neurosci.

141

133

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It has been shown that when subjects can predict object properties [e.g., weight or center of mass (CM)], fingertip forces are appropriately scaled before the object is lifted, i.e., before somatosensory feedback can be processed. However, it is not known whether subjects, in addition to these anticipatory force mechanisms, exploit the ability to choose where digits can be placed to facilitate object manipulation. We addressed this question by asking subjects to reach and grasp an object whose CM was changed to the left, center, or right of the object in either a predictable or unpredictable manner. The only task requirement was to minimize object roll during lift. We hypothesized that subjects would modulate contact points but only when object CM location could be predicted. As expected, object roll was significantly smaller in the predictable condition. This experimental condition was also associated with statistically distinct spatial distributions of contact points as a function of object CM location but primarily when large torques had to be counteracted, i.e., for right and left CM locations. In contrast, when subjects could not anticipate CM location, a "default" distribution of contact points was used, this being statistically indistinguishable from that adopted for the center CM location in the predictable condition. We conclude that choice of contact points is integrated with anticipatory force control mechanisms to facilitate object manipulation. These results demonstrate that planning of digit placement is an important component of grasp control.

show abstract

“…comfort effect" (Rosenbaum et al, 1992;Short and Cauraugh, 1997;Cohen and Rosenbaum, 2004). Our results extend these observations in a number of ways.…”

supporting

confidence: 82%

Choice of Contact Points during Multidigit Grasping: Effect of Predictability of Object Center of Mass Location

Lukos¹,

Ansuini²,

Santello³

2007

J. Neurosci.

141

133

View full text Add to dashboard Cite

show abstract

“…Rosenbaum et al (1992) showed that participants were biased to use an overhand grasp when taking hold of each of a series of objects in a descending order, but the same participants were biased to use an underhand grasp when taking hold of each of a series of objects in an ascending order. Short and Cauraugh (1997) replicated this retrospective eVect, and so did Weiss and Wark (2009), working with cotton-top tamarin monkeys. Weigelt, Rosenbaum, Hüls-horst, and Schack (2009) also replicated the eVect and found that changing grasps within a sequential movement task interfered with an ongoing memory task, supporting the idea that selecting a new grasp is associated with cognitive costs (a topic to which we will turn later in this article).…”

Section: Introductionmentioning

confidence: 82%

“…Several studies demonstrated the end-state comfort eVect for reaching toward an object to be rotated (e.g., Fischman, Stodden, & Lehman, 2003;Haggard, 1998;Herbort & Butz, 2010;Short & Cauraugh, 1997), and one study extended the investigation of the end-state comfort eVect to whole-body movements (Lam, McFee, Chua, & Weeks, 2006). Two other studies showed that the end-state comfort eVect is manifested in nonhuman animals (Chapman, Weiss, & Rosenbaum, 2010;Weiss, Wark, & Rosenbaum, 2007).…”

Section: Introductionmentioning

confidence: 99%

Prospective and retrospective effects in human motor control: planning grasps for object rotation and translation

Cohen

Rosenbaum

2010

Psychological Research

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People pick up objects in ways that reflect prospective as well as retrospective control. Prospective control is indicated by planning for end-state comfort such that people grasp a cylinder to be rotated or translated with a hand orientation or at a height that affords a comfortable final posture. Retrospective control is indicated when people reuse a remembered grasp rather than using a new grasp that would ensure end-state comfort. Here, we asked whether these manifestations of prospective and retrospective control co-occur. We did so by having healthy young-adult participants grasp a cylinder to rotate and translate it between a horizontal position and a vertical position at each of five heights. We found that participants planned for comfortable final hand orientations for first moves but relied on recall for subsequent hand orientations. The results suggest that motor planning is sensitive to computational as well as physical demands and that object rotation and translation are not dissociable features of motor control, at least as reflected in their contributions to grasp selection. The latter result is consistent with the hypothesis that movements constitute holistic body changes between successive goal postures.

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“…A series of laboratory experiments confirmed that the end-state comfort effect is a robust phenomenon (Hermsdörfer, Buchner, Kerkhoff, Mai, & Goldenberg, 1999;Rosenbaum, Vaughan, Jorgensen, Barnes, & Stewart, 1993;Short & Cauraugh, 1997, 1999Steenbergen, Meulenbroek, & Rosenbaum, in press). For example, as seen in Figure 7, when subjects reached out and took hold of a handle to rotate a turntable 180º, they took hold of the handle in such a way that the final posture at the end of the rotation would bring the forearm close to the middle of the pronation-supination range.…”

Section: Meulenbroek and Jonathan Vaughanmentioning

confidence: 89%

What is the point of motor planning?

Rosenbaum¹,

Meulenbroek²,

Vaughan³

2004

International Journal of Sport and Exercise Psychology

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Planning macroscopic aspects of manual control: End-state comfort and point-of-change effects

Cited by 59 publications

References 14 publications

Choice of Contact Points during Multidigit Grasping: Effect of Predictability of Object Center of Mass Location

Choice of Contact Points during Multidigit Grasping: Effect of Predictability of Object Center of Mass Location

Prospective and retrospective effects in human motor control: planning grasps for object rotation and translation

What is the point of motor planning?

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