Sensory Weighting of Force and Position Feedback in Human Motor Control Tasks

Mugge, Winfred; Schuurmans, J.; Schouten, Alfred C.; Helm, F.C.T. van der

doi:10.1523/jneurosci.0116-09.2009

Cited by 56 publications

(73 citation statements)

References 30 publications

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“…van Beers et al 2002b), and also within the same sensory system (e.g. Hillis et al 2004) as for instance across the different types of receptors of the proprioceptive system (Mugge et al 2009). Since sensory weighting has shown to be less efficient in older adults as compared to young ones (Speers et al 2002;Stephen et al 2010), additional attentional resources may be required when the performance in a proprioceptive task has to be maintained in older adults.…”

Section: Effects Of Age On Proprioception In a Matching Single Taskmentioning

confidence: 99%

Presbypropria: the effects of physiological ageing on proprioceptive control

Boisgontier

Olivier

Chenu

et al. 2011

AGE

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Several changes in the human sensory systems, like presbycusis or presbyopia, are wellknown to occur with physiological ageing. A similar change is likely to occur in proprioception, too, but there are strong and unexplained discrepancies in the literature. It was proposed that assessment of the attentional cost of proprioceptive control could provide information able to unify these previous studies. To this aim, 15 young adults and 15 older adults performed a position matching task in single and dual-task paradigms with different difficulty levels of the secondary task (congruent and incongruent Stroop-type tasks) to assess presumed age-related deficits in proprioceptive control. Results showed that proprioceptive control was as accurate and as consistent in older as in young adults for a single proprioceptive task. However, performing a secondary cognitive task and increasing the difficulty of this secondary task evidenced both a decreased matching performance and/or an increased attentional cost of proprioceptive control in older adults as compared to young ones. These results advocated for an impaired proprioception in physiological ageing.

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Section: Effects Of Age On Proprioception In a Matching Single Taskmentioning

confidence: 99%

Presbypropria: the effects of physiological ageing on proprioceptive control

Boisgontier

Olivier

Chenu

et al. 2011

AGE

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“…For example, in dynamic experiments a position task can be expected to involve mainly position feedback, while a force task is likely to benefit from force feedback (Mugge et al 2009). In this study, subjects were required to perform three tasks in face of continuous torque perturbations, according to the following task instructions:

Force task (FT), i.e., maintain force, minimize force deviations.

Relax task (RT), i.e., passive behavior, minimize muscle activity.

Position task (PT), i.e., maintain position, minimize position deviations.

…”

Section: Introductionmentioning

confidence: 99%

A rigorous model of reflex function indicates that position and force feedback are flexibly tuned to position and force tasks

et al. 2009

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This study aims to quantify the separate contributions of muscle force feedback, muscle spindle activity and co-contraction to the performance of voluntary tasks (“reduce the influence of perturbations on maintained force or position”). Most human motion control studies either isolate only one contributor, or assume that relevant reflexive feedback pathways during voluntary disturbance rejection tasks originate mainly from the muscle spindle. Human ankle-control experiments were performed, using three task instructions and three perturbation characteristics to evoke a wide range of responses to force perturbations. During position tasks, subjects (n = 10) resisted the perturbations, becoming more stiff than when being relaxed (i.e., the relax task). During force tasks, subjects were instructed to minimize force changes and actively gave way to imposed forces, thus becoming more compliant than during relax tasks. Subsequently, linear physiological models were fitted to the experimental data. Inhibitory, as well as excitatory force feedback, was needed to account for the full range of measured experimental behaviors. In conclusion, force feedback plays an important role in the studied motion control tasks (excitatory during position tasks and inhibitory during force tasks), implying that spindle-mediated feedback is not the only significant adaptive system that contributes to the maintenance of posture or force.

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“…In particular, our results indicate that cue weights can be predicted adequately from recorded kinematics. This aspect of our approach deviates from common practice in cue combination literature (e.g., Drewing and Kaim 2009;Mugge et al 2009;van Beers et al 1998). Cue reliability is generally considered a property of the stimulus, which, in an experimental setting, must be derived from control conditions.…”

Section: Discussionmentioning

confidence: 72%

Exploratory Movements Determine Cue Weighting in Haptic Length Perception of Handheld Rods

Debats

Langenberg

Kingma

et al. 2010

Journal of Neurophysiology

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In the present study, we sought to unravel how exploratory movements affect length perception of rods that are held in and wielded by hand. We manipulated the mechanical rod properties--mass (m), first moment of mass distribution (M), major principal moment of inertia (I(1))--individually, allowing us to assess the relative contribution of each of these mechanical variables to the perceptual judgment. Furthermore we developed a method to quantify the force components of the mechanical variables in the total of forces acting at the hand-rod interface, and we calculated each component's relative contribution. The laws of mechanics dictate that these relative force contributions depend on the characteristics of the exploratory movements performed. We found a clear relationship between the relative force contribution of the mechanical variables and their contribution to perceived rod length. This finding is the first quantitative demonstration that exploration style determines how much each mechanical variable influences length perception. Moreover, this finding suggested a cue weighting mechanism in which exploratory movements determine cue reliability (and thus cue weighting). We developed a cue combination model for which we first identified three length cues in the form of ratios between the mechanical variables. Second, we calculated the weights of these cues from the recorded rod movements. The model provided a remarkably good prediction of the experimental data. This strongly suggests that rod length perception by wielding is achieved through a weighted combination of three specific length cues, whereby the weighting depends on the characteristics of the exploratory movements.

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Sensory Weighting of Force and Position Feedback in Human Motor Control Tasks

Cited by 56 publications

References 30 publications

Presbypropria: the effects of physiological ageing on proprioceptive control

Presbypropria: the effects of physiological ageing on proprioceptive control

A rigorous model of reflex function indicates that position and force feedback are flexibly tuned to position and force tasks

Exploratory Movements Determine Cue Weighting in Haptic Length Perception of Handheld Rods

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