Intermanual interactions in discrete and periodic bimanual movements with same and different amplitudes.

Full Abstract

In two experiments we compared intermanual interactions in discrete and periodic movements with same and different amplitudes. In the first experiment there was only a weak amplitude assimilation in first cycles of movements with 1, 3, and 10 cycles, but a strong assimilation in later cycles. Whereas movement times of concurrent short-amplitude and long-amplitude movements were different in first cycles, in the later cycles they were essentially identical. In the second experiment the timed-response procedure was used to study the specification of same and different amplitudes of discrete reversal movements and periodic movements with three cycles. Differences in the time courses of amplitude specifications were only small. In periodic movements a dependence of amplitudes on the preparation interval was seen not only in the first cycles, but also in the later ones. However, in the later cycles the characteristic dependence of assimilation effects and intermanual correlations on the preparation interval was absent. Taken together, these findings strongly suggest that intermanual interactions arise transiently in the specification of both discrete and periodic movements, and that additional kinds of interactions become effective during execution of periodic movements.

Author information

Author/s: Heuer, Herbert (H); Klein, Wolfhard (W);

Affiliation: Institut für Arbeitsphysiologie an der Universität Dortmund , Ardeystrabe 67, Germany. heuer(-atsign-)ifado.de

Journal and publication information

Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't

Journal: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale (Exp Brain Res), published in Germany. (Language: eng)

Reference: 2005-Nov; vol 167 (issue 2) : pp 220-37

Dates: Created 2005/12/12; Completed 2006/02/21; Revised 2008/02/15;

PMID: 16175364, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

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