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Title of Journal: Exp Brain Res

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Abbravation: Experimental Brain Research

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Springer-Verlag

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10.1007/s10144-011-0262-9

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1432-1106

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Tactile feedback contributes to consistency of fin

Authors: Ely Rabin Andrew M Gordon
Publish Date: 2003/12/19
Volume: 155, Issue: 3, Pages: 362-369
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Abstract

Touch typing movements are typically too brief to use online feedback Yet previous studies have shown that blocking tactile feedback of the fingertip of typists leads to an increase in typing errors To determine the contribution of tactile information to rapid fine motor skills we analyzed kinematics of the right index finger during typing with and without tactile feedback Twelve expert touch typists copytyped sentences on a computer keyboard without vision of their hands or the computer screen Following control trials their right index fingertip was anesthetized and sentences were typed again The movements of the finger were recorded with an instrumented glove and electromagnetic position sensor During anesthesia typing errors of that finger increased sevenfold While the interkeypress timing and average kinematics were unaffected there was an increase in variability of all measures Regression analysis showed that endpoint variability was largely accounted for by start location variability The results suggest that tactile cues provide information about the start location of the finger which is necessary to perform typing movements accuratelyWe thank Matthew Bartels MD for administering the anesthesia to subjects Mark Gillman for assistance in data collection and analysis and Steve Silverman EdD for statistical advice This project was supported by NSF grant 9733679 AMG and NIH Grant 5F32HD042929 ER

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