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| Research article summary (published May 2002): |
Initiation of a vertical jump: the human body's upward propulsion depends on control of forward equilibrium.
Full Abstract
The aim of the study was to understand:
(i), how far anticipatory postural adjustments (APA) participate in the sequences of a complex task; (ii), how, in the sagittal plane, horizontal and vertical progressions of the center of gravity (CG) are managed to achieve the prescribed goal. A posturo-kinetics sequence is identified during which forward CG progression is controlled in terms of a center of pressure (CP)-CG interaction. CP shifts and horizontal CG accelerations are correlated in timing and amplitude. There exists a control of whole body progression during the impulse, implying a braking of forwards movement. Vertical and horizontal CG accelerations are inter-dependent, and backward CP shift duration is related to its forward displacement. During the vertical jump initiation, whole body vertical propulsion and forward fall are linked. To increase impulse amplitude, initial whole body disequilibrium is lengthened and forward CG acceleration is greater. APA programming is probably elaborated on the basis of cognitive evaluation of the antero-posterior disturbance.
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Author information
Author/s: Le Pellec, Armande (A); Maton, Bernard (B);
Affiliation: Laboratoire de Physiologie du Mouvement, Orsay, France. armande.le_pellec_muller(-atsign-)u-paris10.fr
Journal and publication information
Publication Type: Journal Article
Journal: Neuroscience letters (Neurosci Lett), published in Ireland. (Language: eng)
Reference: 2002-May; vol 323 (issue 3) : pp 183-6
Dates: Created 2002/04/17; Completed 2002/06/25; Revised 2004/11/17;
PMID: 11959415, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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