Stability of rhythmic visuo-motor tracking does not depend on relative velocity
Exp Brain Res. 2007-11-01; 184(2): 269-273
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1. Exp Brain Res. 2008 Jan;184(2):269-73. Epub 2007 Nov 1.
Stability of rhythmic visuo-motor tracking does not depend on relative velocity.
de Rugy A(1), Oullier O, Temprado JJ.
(1)Perception and Motor Systems Laboratory, School of Human Movement Studies,
Room 424, Building 26, University of Queensland, St Lucia, QLD, 4072, Australia.
It is well established that the in-phase pattern of bimanual coordination (i.e. a
relative phase of 0 degrees ) is more stable than the antiphase pattern (i.e., a
relative phase of 180 degrees ), and that a spontaneous transition from antiphase
to in-phase typically occurs as the movement frequency is gradually increased. On
the basis of results from relative phase perception experiments, Bingham
(Proceedings of the 23rd annual conference of the cognitive science society.
Laurence Erlbaum Associates, Mahwah, pp 75-79, 2001; Ecol Psychol 16:45-53, 2004;
Advances in psychology 135: time-to-contact. Elsevier, Amsterdam, pp 421-442,
2004) proposed a dynamical model that consists of two phase driven oscillators
coupled via the perceived relative phase, the resolution of which is determined
by relative velocity. In the present study, we specifically test behavioral
predictions from this last assumption during a unimanual visuo-motor tracking
task. Different conditions of amplitudes and frequencies were designed to
manipulate selectively relative phase and relative velocity. While the known
effect of phase and frequency were observed, relative phase variability was not
affected by the different conditions of relative velocity. As such, Bingham’s
model assumption that instability in relative phase coordination is brought about
by relative velocity that affects the resolution of the perceived relative phase
has been invalidated for the case of rhythmic unimanual visuo-motor tracking.
Although this does not rule out the view that relative phase production is
constrained by relative phase perception, the mechanism that would be responsible
for this phenomenon still has to be established.
PMID: 17973102 [Indexed for MEDLINE]