Coupling phenomena during asynchronous submaximal two-hand, multi-finger force production tasks in humans

Sheng Li; Frederic Danion; Vladimir M. Zatsiorsky; Mark L. Latash

doi:10.1016/S0304-3940(02)00869-8

Coupling phenomena during asynchronous submaximal two-hand, multi-finger force production tasks in humans

Sheng Li, Frederic Danion, Vladimir M. Zatsiorsky, Mark L. Latash

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We studied asynchronous two-hand multi-finger force production at submaximal levels. Subjects produced constant levels of force with one hand (F_REF), and started ramp force production with the other hand (F_RAMP) 3 s later. The zero-maximal force-zero ramp lasted 10 s. Visual feedback was provided only for F_REF during the first 3 s and only for F_RAMP during the rest of the trial. The initiation of F_RAMP induced a transient overshoot by F_RAMP and a drop in F_REF; both scaled with F_REF. Later into the trial, F_REF dropped slowly, while F_RAMP undershot maximal force by about 15%. Two regimes of bimanual interaction are hypothesized, 'strong interaction' when an effector is added to a one-hand task, and 'weak interaction' during two-hand force production.

Original language	English (US)
Pages (from-to)	75-78
Number of pages	4
Journal	Neuroscience letters
Volume	331
Issue number	2
DOIs	https://doi.org/10.1016/S0304-3940(02)00869-8
State	Published - Oct 11 2002

All Science Journal Classification (ASJC) codes

General Neuroscience

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10.1016/S0304-3940(02)00869-8

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title = "Coupling phenomena during asynchronous submaximal two-hand, multi-finger force production tasks in humans",

abstract = "We studied asynchronous two-hand multi-finger force production at submaximal levels. Subjects produced constant levels of force with one hand (FREF), and started ramp force production with the other hand (FRAMP) 3 s later. The zero-maximal force-zero ramp lasted 10 s. Visual feedback was provided only for FREF during the first 3 s and only for FRAMP during the rest of the trial. The initiation of FRAMP induced a transient overshoot by FRAMP and a drop in FREF; both scaled with FREF. Later into the trial, FREF dropped slowly, while FRAMP undershot maximal force by about 15%. Two regimes of bimanual interaction are hypothesized, 'strong interaction' when an effector is added to a one-hand task, and 'weak interaction' during two-hand force production.",

author = "Sheng Li and Frederic Danion and Zatsiorsky, {Vladimir M.} and Latash, {Mark L.}",

note = "Funding Information: We would like to thank Dr Dagmar Sternad for helpful discussions. The study was in part supported by National Institutes of Health (NIH) grants NS-35032 and AG-018751.",

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AU - Li, Sheng

AU - Danion, Frederic

AU - Zatsiorsky, Vladimir M.

AU - Latash, Mark L.

N1 - Funding Information: We would like to thank Dr Dagmar Sternad for helpful discussions. The study was in part supported by National Institutes of Health (NIH) grants NS-35032 and AG-018751.

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N2 - We studied asynchronous two-hand multi-finger force production at submaximal levels. Subjects produced constant levels of force with one hand (FREF), and started ramp force production with the other hand (FRAMP) 3 s later. The zero-maximal force-zero ramp lasted 10 s. Visual feedback was provided only for FREF during the first 3 s and only for FRAMP during the rest of the trial. The initiation of FRAMP induced a transient overshoot by FRAMP and a drop in FREF; both scaled with FREF. Later into the trial, FREF dropped slowly, while FRAMP undershot maximal force by about 15%. Two regimes of bimanual interaction are hypothesized, 'strong interaction' when an effector is added to a one-hand task, and 'weak interaction' during two-hand force production.

AB - We studied asynchronous two-hand multi-finger force production at submaximal levels. Subjects produced constant levels of force with one hand (FREF), and started ramp force production with the other hand (FRAMP) 3 s later. The zero-maximal force-zero ramp lasted 10 s. Visual feedback was provided only for FREF during the first 3 s and only for FRAMP during the rest of the trial. The initiation of FRAMP induced a transient overshoot by FRAMP and a drop in FREF; both scaled with FREF. Later into the trial, FREF dropped slowly, while FRAMP undershot maximal force by about 15%. Two regimes of bimanual interaction are hypothesized, 'strong interaction' when an effector is added to a one-hand task, and 'weak interaction' during two-hand force production.

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Coupling phenomena during asynchronous submaximal two-hand, multi-finger force production tasks in humans

Abstract

All Science Journal Classification (ASJC) codes

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