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Instabilities during antiphase bimanual movements: are ipsilateral pathways involved?


Kagerer, FA and Summers, JJ and Semjen, A, Instabilities during antiphase bimanual movements: are ipsilateral pathways involved?, Experimental Brain Research, 151, (4) pp. 489-500. ISSN 0014-4819 (2003) [Refereed Article]

DOI: doi:10.1007/s00221-003-1496-3


The spatial and temporal coupling between the hands is known to be very robust during movements which use homologous muscles (in-phase or symmetric movements). In contrast, movements using nonhomologous muscles (antiphase or asymmetric movements) are less stable and exhibit a tendency to undergo a phase transition to in-phase movements as movement frequency increases. The instability during antiphase movements has been modeled in terms of signal interference mediated by the ipsilateral corticospinal pathways. In this study we report that participants in whom distal ipsilateral motor-evoked potentials could be elicited with transcranial magnetic stimulation (TMS), exhibited higher variability during a bimanual circling task than participants whose ipsilateral pathways could not be transcranially activated. These results suggest that ipsilateral control of the limb affects the level of bimanual coupling, and may contribute to uncoupling phenomena observed during asymmetric coordination.

Item Details

Item Type:Refereed Article
Research Division:Psychology
Research Group:Cognitive and computational psychology
Research Field:Sensory processes, perception and performance
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in psychology
UTAS Author:Kagerer, FA (Dr Florian Kagerer)
UTAS Author:Summers, JJ (Professor Jeffery Summers)
ID Code:26804
Year Published:2003
Web of Science® Times Cited:43
Deposited By:Psychology
Deposited On:2003-08-01
Last Modified:2004-04-21

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