Towards a Unified Theory of Rhythmic and Discrete Movements — Behavioral, Modeling and Imaging Results

Sternad, Dagmar

doi:10.1007/978-3-540-74479-5_6

Cited by 37 publications

(37 citation statements)

References 61 publications

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“…These two elements would have to be combined in a stratified structure: the desired impact velocity could be (re-) computed based on perceived perturbations, leading to possible recomputation of the feedback gains driving the racket movement. The two-layer distinction is also consistent with the proposition that discrete and continuous elements of a movement may be under separate control, as suggested by several behavioral and imaging studies (Buchanan et al 2006;Huys et al 2008;Schaal et al 2004;Smits-Engelsman et al 2006;Sternad et al 2000;Sternad 2008). …”

Section: Discussionsupporting

confidence: 85%

“…Similarly, piano playing is regarded as an archetypal rhythmic action, yet simultaneously integrates discrete and very accurate reaches across the keyboard. Coordination and control of such hybrid actions may therefore pose more complex problems than each action by itself and probably engage overlapping circuitries and mechanisms (Ronsse et al 2009;Sternad 2008;Sternad et al 2000).…”

Section: Introductionmentioning

confidence: 99%

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Optimal Control of a Hybrid Rhythmic-Discrete Task: The Bouncing Ball Revisited

Ronsse

Wei

Sternad

2010

Journal of Neurophysiology

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Ronsse R, Wei K, Sternad D. Optimal control of a hybrid rhythmic-discrete task: the bouncing ball revisited. J Neurophysiol 103: 2482-2493, 2010. First published February 3, 2010 doi:10.1152/jn.00600.2009. Rhythmically bouncing a ball with a racket is a hybrid task that combines continuous rhythmic actuation of the racket with the control of discrete impact events between racket and ball. This study presents experimental data and a two-layered modeling framework that explicitly addresses the hybrid nature of control: a first discrete layer calculates the state to reach at impact and the second continuous layer smoothly drives the racket to this desired state, based on optimality principles. The testbed for this hybrid model is task performance at a range of increasingly slower tempos. When slowing the rhythm of the bouncing actions, the continuous cycles become separated into a sequence of discrete movements interspersed by dwell times and directed to achieve the desired impact. Analyses of human performance show increasing variability of performance measures with slower tempi, associated with a change in racket trajectories from approximately sinusoidal to less symmetrical velocity profiles. Matching results of model simulations give support to a hybrid control model based on optimality, and therefore suggest that optimality principles are applicable to the sensorimotor control of complex movements such as ball bouncing.

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Section: Discussionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Optimal Control of a Hybrid Rhythmic-Discrete Task: The Bouncing Ball Revisited

Ronsse

Wei

Sternad

2010

Journal of Neurophysiology

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“…Among the latest elaborations is that in response to the potential dichotomy of rhythmic and non-rhythmic (discrete) movements (for overviews see Huys, Studenka, Rheame, Zelaznik, &Sternad, 2008). The issue can be framed in several ways.…”

Section: Scope Of the Hkb Modelmentioning

confidence: 98%

Symmetry axiom of Haken–Kelso–Bunz coordination dynamics revisited in the context of cognitive activity

Frank

Silva

Turvey

2012

Journal of Mathematical Psychology

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“…Another difficulty comes from the fact that rhythmic and discrete movements have mainly been studied separately in the literature, although some interesting (relatively recent) articles on their combinations exist (as for instance Hogan and Sternad (2007) or Sternad (2007)). From our point of view, this distinction is mainly due to two interlinked factors.…”

Section: Defining Discrete and Rhythmic Movementsmentioning

confidence: 99%

“…The oscillation is either physiological (Goodman and Kelso (1983); Adamovich et al (1994); Michaels and Bongers (1994); Sternad et al (2000)) or pathological (Wierzbicka et al (1993); Elble et al (1994); Staude et al (2002)), the reader is referred to Sternad (2007) for a thorough review. In all these experiments, an entrainment effect is observed, that is the discrete movement is phase-coupled with the rhythmic movement, in the sense that the onset of the discrete movement occurs preferably (though not always) during a specific phase window of the oscillations.…”

Section: The Combination Of Discrete and Rhythmic Movementsmentioning

confidence: 99%

Modeling discrete and rhythmic movements through motor primitives: a review

Dégallier

Ijspeert

2010

Biol Cybern

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Rhythmic and discrete movements are frequently considered separately in motor control, probably because different techniques are commonly used to study and model them. Yet, an increasing interest for a comprehensive model for movement generation requires to bridge the different perspectives arising from the study of those two types of movements. In this article, we consider discrete and rhythmic movement within the framework of motor primitives, i.e. of modular generation of movements. Thereby we hope to get an insight into the functional relationships between discrete and rhythmic movements and thus into a suitable representation for both of them. Within this framework we can define four possible categories of modeling for discrete and rhythmic movements depending on the required command signals and on the spinal processes involved in the generation of the movements. These categories are first discussed relatively to biological concepts such as force fields and central pattern generators and are then illustrated by several mathematical models based on dynamical system theory. A discussion on the plausibility of theses models concludes this work.

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Towards a Unified Theory of Rhythmic and Discrete Movements — Behavioral, Modeling and Imaging Results

Cited by 37 publications

References 61 publications

Optimal Control of a Hybrid Rhythmic-Discrete Task: The Bouncing Ball Revisited

Optimal Control of a Hybrid Rhythmic-Discrete Task: The Bouncing Ball Revisited

Symmetry axiom of Haken–Kelso–Bunz coordination dynamics revisited in the context of cognitive activity

Modeling discrete and rhythmic movements through motor primitives: a review

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