PMID: 11343830May 10, 2001Paper

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

Neuroscience Letters
M MiyazakiT Ohtsuki

Abstract

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 (beta=0.3). This beta value was reduced at the peak velocity (beta=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.

References

Feb 1, 1990·Scientific American·A L GoldbergerB J West
Jul 1, 1988·Psychological Review·D E MeyerJ E Smith
Apr 16, 1999·Experimental Brain Research·J Messier, J F Kalaska
Sep 1, 1987·Journal of Motor Behavior·W G Darling, J D Cooke

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Citations

Feb 20, 2008·Experimental Brain Research·André B Valdez, Eric L Amazeen
Jun 22, 2012·Experimental Brain Research·Andrew B Slifkin, Jeffrey R Eder
Dec 28, 2010·Journal of Motor Behavior·André B Valdez, Eric L Amazeen
Feb 18, 2014·Experimental Brain Research·Andrew B Slifkin, Jeffrey R Eder
Oct 19, 2004·Neuroscience Letters·Hiroshi KadotaTatsuyuki Ohtsuki
May 27, 2020·Human Movement Science·Andrew B Slifkin, Jeffrey R Eder

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