Title: Coordination of complex bimanual multijoint movements under increasing cycling frequencies: the prevalence of mirror-image and translational symmetry
Authors: Li, Yong *
Levin, Oron * ×
Forner-Cordero, Arturo
Ronsse, Renaud
Swinnen, Stephan #
Issue Date: 22-Jan-2009
Publisher: North-Holland
Series Title: Acta Psychologica vol:130 pages:183-195
Abstract: The present study examined the principles underlying inter and intralimb coordination constraints during
performance of bimanual elbow–wrist movements at different cycling frequencies (from 0.75 Hz to
2.50 Hz). Participants performed eight coordination tasks that consisted of a combination of in-phase
(IN) and/or anti-phase (AN) coordination modes between both elbows and wrists (interlimb), with isodirectional
(Iso) or non-isodirectional (NonI) coordination modes within each limb (intralimb). As
expected, the principle of muscle homology (in-phase coordination), giving rise to mirror symmetrical
movements with respect to the mid-sagittal plane, had a powerful influence on the quality of global coordinative
behavior both between and within limbs. When this principle was violated (i.e., when the antiphase
mode was introduced in one or both joint pairs), the non-isodirectional intralimb mode exhibited a
(de)stabilizing role in coordination, which became more pronounced at higher cycling frequencies. However,
pattern loss with increasing cycling frequency resulted not only in convergence toward the more
stable in-phase patterns with the elbows and wrists but also to the anti-phase patterns (which were associated
with directional compatibility of within-limb motions). Moreover, participants generally preserved
their initial mode of coordination (either in-phase or anti-phase) in the proximal joints (i.e., elbows)
while shifting from anti-phase to in-phase (or vice versa) with their distal joint pair (i.e., wrists). Taken
together, these findings reflect the impact of two immanent types of symmetry in bimanual coordination:
mirror-image and translational symmetry.
ISSN: 0001-6918
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Movement Control & Neuroplasticity Research Group
* (joint) first author
× corresponding author
# (joint) last author

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