Fractal correlation of initial trajectory dynamics vanishes at the movement end point in human rapid goal-directed movements

Many researchers have investigated the variability of discrete goal-directed movements. However, a possible time-dependent property for them has been ignored. We investigated the time-dependent property of the kinematic variability in human rapid goal-directed movements by using fractal analysis. Th...

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Published in:Neuroscience letters 2001-05, Vol.304 (3), p.173-176
Main Authors: Miyazaki, Makoto, Kadota, Hiroshi, Kudo, Kazutoshi, Masani, Kei, Ohtsuki, Tatsuyuki
Format: Article
Language:English
Subjects:
1/f fluctuation
Acceleration
Adult
Biological and medical sciences
Biomechanical Phenomena
Female
Fractal
Fractals
Fundamental and applied biological sciences. Psychology
Goal-directed movements
Human
Humans
Kinematics
Male
Psychomotor Performance - physiology
Variability
Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports
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cited_by cdi_FETCH-LOGICAL-c486t-b1038323e34dc822d107f7a7f4ba998ee8553c4567a554823dea8d042658eadf3
cites cdi_FETCH-LOGICAL-c486t-b1038323e34dc822d107f7a7f4ba998ee8553c4567a554823dea8d042658eadf3
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container_title Neuroscience letters
container_volume 304
creator Miyazaki, Makoto
Kadota, Hiroshi
Kudo, Kazutoshi
Masani, Kei
Ohtsuki, Tatsuyuki
description Many researchers have investigated the variability of discrete goal-directed movements. However, a possible time-dependent property for them has been ignored. We investigated the time-dependent property of the kinematic variability in human rapid goal-directed movements by using fractal analysis. The variability of the peak acceleration had fractal time correlation characterized by a non-negligible frequency-spectral exponent ( β=0.3). This β value was reduced at the peak velocity ( β=0.2) and nearly reached zero at the peak movement amplitude, indicating that the variability became white noise with no time correlation. A similar result was observed in the progress of the positional trajectory. The functional significance of this phenomenon for the goal-directed task demand is discussed.
doi_str_mv 10.1016/S0304-3940(01)01779-7
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subjects 1/f fluctuation
Acceleration
Adult
Biological and medical sciences
Biomechanical Phenomena
Female
Fractal
Fractals
Fundamental and applied biological sciences. Psychology
Goal-directed movements
Human
Humans
Kinematics
Male
Psychomotor Performance - physiology
Variability
Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports
title Fractal correlation of initial trajectory dynamics vanishes at the movement end point in human rapid goal-directed movements
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