Keeping with the beat: movement trajectories contribute to movement timing

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Keeping with the beat: movement trajectories contribute to movement timing. / Balasubramaniam, Ramesh; Wing, Alan; Dafferrshofer, A.

In: Experimental Brain Research, Vol. 159, 01.01.2004, p. 129-134.

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@article{509571541c8448ff93c4ea5e1ea11451,
title = "Keeping with the beat: movement trajectories contribute to movement timing",
abstract = "Previous studies of paced repetitive movements with respect to an external beat have either emphasised (a) the form of movement trajectories or (b) timing errors made with respect to the external beat. The question of what kinds of movement trajectories assist timing accuracy has not previously been addressed. In an experiment involving synchronisation or syncopation with an external auditory metronome we show that the nervous system produces trajectories that are asymmetric with respect to time and velocity in the out and return phases of the repeating movement cycle. This asymmetry is task specific and is independent of motor implementation details (finger flexion vs. extension). Additionally, we found that timed trajectories are less smooth (higher mean squared jerk) than unpaced ones. The degree of asymmetry in the flexion and extension movement times is positively correlated with timing accuracy. Negative correlations were observed between synchronisation timing error and the movement time of the ensuing return phase, suggesting that late arrival of the finger is compensated by a shorter return phase and conversely for early arrival. We suggest that movement asymmetry in repetitive timing tasks helps satisfy requirements of precision and accuracy relative to a target event.",
keywords = "movement timing, movement trajectories, movement synchronisation, timed repetitive actions, jerk minimisation",
author = "Ramesh Balasubramaniam and Alan Wing and A Dafferrshofer",
year = "2004",
month = jan,
day = "1",
language = "English",
volume = "159",
pages = "129--134",
journal = "Experimental Brain Research",
issn = "0014-4819",
publisher = "Springer",

}

RIS

TY - JOUR

T1 - Keeping with the beat: movement trajectories contribute to movement timing

AU - Balasubramaniam, Ramesh

AU - Wing, Alan

AU - Dafferrshofer, A

PY - 2004/1/1

Y1 - 2004/1/1

N2 - Previous studies of paced repetitive movements with respect to an external beat have either emphasised (a) the form of movement trajectories or (b) timing errors made with respect to the external beat. The question of what kinds of movement trajectories assist timing accuracy has not previously been addressed. In an experiment involving synchronisation or syncopation with an external auditory metronome we show that the nervous system produces trajectories that are asymmetric with respect to time and velocity in the out and return phases of the repeating movement cycle. This asymmetry is task specific and is independent of motor implementation details (finger flexion vs. extension). Additionally, we found that timed trajectories are less smooth (higher mean squared jerk) than unpaced ones. The degree of asymmetry in the flexion and extension movement times is positively correlated with timing accuracy. Negative correlations were observed between synchronisation timing error and the movement time of the ensuing return phase, suggesting that late arrival of the finger is compensated by a shorter return phase and conversely for early arrival. We suggest that movement asymmetry in repetitive timing tasks helps satisfy requirements of precision and accuracy relative to a target event.

AB - Previous studies of paced repetitive movements with respect to an external beat have either emphasised (a) the form of movement trajectories or (b) timing errors made with respect to the external beat. The question of what kinds of movement trajectories assist timing accuracy has not previously been addressed. In an experiment involving synchronisation or syncopation with an external auditory metronome we show that the nervous system produces trajectories that are asymmetric with respect to time and velocity in the out and return phases of the repeating movement cycle. This asymmetry is task specific and is independent of motor implementation details (finger flexion vs. extension). Additionally, we found that timed trajectories are less smooth (higher mean squared jerk) than unpaced ones. The degree of asymmetry in the flexion and extension movement times is positively correlated with timing accuracy. Negative correlations were observed between synchronisation timing error and the movement time of the ensuing return phase, suggesting that late arrival of the finger is compensated by a shorter return phase and conversely for early arrival. We suggest that movement asymmetry in repetitive timing tasks helps satisfy requirements of precision and accuracy relative to a target event.

KW - movement timing

KW - movement trajectories

KW - movement synchronisation

KW - timed repetitive actions

KW - jerk minimisation

M3 - Article

C2 - 15365663

VL - 159

SP - 129

EP - 134

JO - Experimental Brain Research

JF - Experimental Brain Research

SN - 0014-4819

ER -