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.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Miyazaki M,Kadota H,Kudo K,Masani K,Ohtsuki Tdoi
10.1016/s0304-3940(01)01779-7keywords:
subject
Has Abstractpub_date
2001-05-25 00:00:00pages
173-6issue
3eissn
0304-3940issn
1872-7972pii
S0304394001017797journal_volume
304pub_type
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