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Electromyographic Patterns Associated with Discrete Limb MovementsThe relationship between the movement time (MT) for accurate and rapid discrete movements of distance A to a target of width W was quantified by Fitts and is given by the equation: MT = a + b log sub 2 (2A/W). This relationship, known as Fitt's Law, received considerable support for many types of movements. It also raises the interesting question: if MT is affected by distance moved and accuracy, then how do the patterns of muscle activation alter? It is suggested that it is unlikely that all movements are initiated by a pulse of constant duration. Instead, it seems that movements are initiated by an agonist burst which is scaled both in the amount of activation and the duration of activation according to either distance, target size, velocity, or a combination of factors. The number of bursts varies considerably and further research is required to establish: (1) which factors affect the pattern of the signal and (2) how different patterns produce movement trajectories.
Document ID
19850006242
Document Type
Conference Paper
Authors
Corcos, D. M. (Rush Medical Coll. Chicago, IL, United States)
Gottlieb, G. L. (Rush Medical Coll. Chicago, IL, United States)
Agarwal, G. C. (Rush Medical Coll. Chicago, IL, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1984
Publication Information
Publication: NASA. Ames Research Center 20th Ann Conf. on Manual Control, Vol. 2
Subject Category
MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
Funding Number(s)
CONTRACT_GRANT: NIH-AM-33189
CONTRACT_GRANT: NSF IESE-82-12067
CONTRACT_GRANT: NIH-NS-15630
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19850006226Analytic PrimaryTwentieth Annual Conference on Manual Control, Volume 2
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