Geometrical conditions for ballistic and visually controlled movements

The ballistic movement is defined as a rapid voluntary movement which is motor programmed and in which visual feedback for path correction is not possible. A discrete ballistic movement is of short movement duration (less than about 200 msec) with a triphasic pattern in the electromyograph (EMG) for...

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Bibliographic Details
Published in:Ergonomics 1988-05, Vol.31 (5), p.829-839
Main Authors: GAN, KHAI-CHUNG, HOFFMANN, ERROL R.
Format: Article
Language:English
Subjects:
Adult
Arm - physiology
Ballistic
Biological and medical sciences
Biomechanical Phenomena
Female
Fundamental and applied biological sciences. Psychology
Human movements
Humans
Male
Movement
Olfactory system and olfaction. Gustatory system and gustation
Space life sciences
Time Factors
Vertebrates: nervous system and sense organs
Vision, Ocular - physiology
Visually-controlled
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Summary:The ballistic movement is defined as a rapid voluntary movement which is motor programmed and in which visual feedback for path correction is not possible. A discrete ballistic movement is of short movement duration (less than about 200 msec) with a triphasic pattern in the electromyograph (EMG) for muscle activity and has an acceleration pattern which approximates a sinusoidal waveform. When the Index of Difficulty for such a movement is less than 3·0, the movement time is found to be related to the square root of the movement amplitude. The occurrence of ballistic movement is determined by the combined factors of Fitts' Index of Difficulty and movement amplitude.
ISSN:0014-0139
1366-5847
DOI:10.1080/00140138808966724