Finger synergies during multi-finger cyclic production of moment of force.

Finger synergies during multi-finger cyclic production of moment of force. Research Abstract Details 

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Finger synergies during multi-finger cyclic production of moment of force. Abstract Text:

Wei Zhang,Vladimir M Zatsiorsky,Mark L Latash,Wei Zhang,Vladimir M Zatsiorsky,Mark L Latash,

We investigated multi-finger synergies stabilizing the total moment of force and the total force when the subjects produced a quick cyclic change in the total moment of force. The seated subjects performed the task with the fingers of the dominant arm while paced by the metronome at 1.33 Hz. They were required to produce a rhythmic, sine-like change in the total pronation-supination moment of force computed with respect to the midpoint between the middle and ring fingers. The framework of the uncontrolled manifold hypothesis was used to compute indices of stabilization of the total moment and of the total force across 20 cycles. Variance of the total moment showed a cyclic pattern with peaks close to the peak rate of the moment change. Variance of the total force was maximal close to peak moment into supination. Higher magnitudes of the moment directed against the required moment direction (antagonist moment) were produced by individual fingers during supination efforts as compared to pronation efforts. Indices of multi-finger synergies showed across-trials stabilization of the total moment over the whole cycle but not of the total force. These indices were smaller during supination efforts. We conclude that the central nervous system facilitates multi-finger synergies stabilizing the total rotational action across a variety of tasks. Synergies stabilizing the total force are not seen in tasks that do not explicitly require accurate force control. Pronation efforts are performed more efficiently and with better stabilization of the action.

Finger synergies during multi-finger cyclic production of moment of force. Publishing Authors By Initials

W Zhang,VM Zatsiorsky,ML Latash,W Zhang,VM Zatsiorsky,ML Latash,

For similar behavioral disciplines and activities: psychological tests: neuropsychological tests research abstracts see: behavioral disciplines and activities: psychological tests: neuropsychological tests research

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Finger synergies during multi-finger cyclic production of moment of force. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Experimental brain research. Experimentelle Hirnf

VOLUME: 177

Page Numbers: 243-54

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ISSN: 0014-4819

DAY: 31

MONTH: 08

YEAR: 2006

Finger synergies during multi-finger cyclic production of moment of force. Information

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LANGUAGE: eng

NlmUniqueID: 43312

Finger synergies during multi-finger cyclic production of moment of force. Keywords Mesh Terms:

KEYWORDS: Neuropsychological Tests

MESH TERMS: physiology

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Grant and Affiliation Information for Finger synergies during multi-finger cyclic production of moment of force.

AFFILIATION: Department of Kinesiology, The Pennsylvania State University, University Park, PA 16802, USA.

Country: Germany

AGENCY: United States NINDS

GRANT: NS-035032

ACRONYM: NS

MEDLINETA: Exp Brain Res

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