What the Eye Tells the Hand |
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Authors: | Derek F Stubbs |
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Institution: | Department of Physiology, Guy’s Hospital Medical School, London |
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Abstract: | The information flow necessary to coordinate hand movements with vision is summarized. A series of experiments was performed which quantitatively examined and confirmed the summary. In general, an information-theoretic approach was used. It was confirmed that the speed and accuracy of hand movements are in a reciprocal relationship. The accuracy of a movement is more sensitive to a loss of visual information than the pacing mechanism. Both speed and accuracy are sensitive to withdrawal of information to maintain posture. It is suggested that the retrieval of a movement pre-program is disturbed by afferent “noise.” The contribution of visual information to controlling standing posture, arm and shoulder movement, and wrist movement were investigated. |
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Keywords: | aiming Fitts' law movement correction speed-accuracy trade-off |
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