Kinematic properties of on-line error corrections in the monkey.

Kinematic properties of on-line error corrections in the monkey. Research Abstract Details 

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Kinematic properties of on-line error corrections in the monkey. Abstract Text:

Alon Fishbach,Stephane A Roy,Christina Bastianen,Lee E Miller,James C Houk,

Despite the abundant experimental evidence for the irregular, multipeaked velocity profiles that often characterize rapid human limb movements, there is currently little agreement on how to interpret these phenomena. While in some studies these irregularities have been interpreted as reflecting a continuous control process, in others the irregularities are considered to be evidence for the existence of discrete movement primitives that are initiated by an intermittent controller. Here we introduce a novel "soft symmetry" method for analyzing irregular movements and decomposing them into their discrete movement primitives. We applied this method to analyze rapid pronation/supination wrist movements in monkeys during a one-dimensional tracking task. We showed that the properties of the extracted overlapping submovements (OSMs) were very similar to those of single, regular movements, despite the fact that the decomposition algorithm did not restrict the extracted submovements to a particular shape. In addition we showed that the movement primitives corrected preceding primitives and that the correction initiation time was highly variable, and thus could not be explained by the relatively fixed sensorimotor delay. These results argue against the interpretation of movement irregularities as reflecting a continuous control process and reinforce the hypothesis that movement irregularities result from an intermittent control mechanism. Demonstrating these phenomena in non-human primates will allow neurophysiological investigation of the neural mechanisms involved in these corrections.

Kinematic properties of on-line error corrections in the monkey. Publishing Authors By Initials

A Fishbach,SA Roy,C Bastianen,LE Miller,JC Houk,

For similar psychological phenomena and processes: mental processes: perception: space perception research abstracts see: psychological phenomena and processes: mental processes: perception: space perception research

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Kinematic properties of on-line error corrections in the monkey. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Experimental brain research. Experimentelle Hirnfo

VOLUME: 164

Page Numbers: 442-57

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ISSN: 0014-4819

DAY: 7

MONTH: 06

YEAR: 2005

Kinematic properties of on-line error corrections in the monkey. Information

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LANGUAGE: eng

NlmUniqueID: 43312

Kinematic properties of on-line error corrections in the monkey. Keywords Mesh Terms:

KEYWORDS: Space Perception

MESH TERMS: physiology

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Grant and Affiliation Information for Kinematic properties of on-line error corrections in the monkey.

AFFILIATION: Department of Physiology, Northwestern University, 303 East Chicago Ave., Chicago, IL, 60611, USA. fishbach@northwestern.edu

Country: Germany

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MEDLINETA: Exp Brain Res

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