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The role of posture, magnification, and grip force on microscopic accuracy

Safwat, Basil and Su, Eileen L. M. and Gassert, Roger and Teo, Chee Leong and Burdet, Etienne (2009) The role of posture, magnification, and grip force on microscopic accuracy. Annals of Biomedical Engineering, 37 (5). pp. 997-1006. ISSN 0090-6964

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Official URL: http://dx.doi.org/10.1007/s10439-009-9664-7

Abstract

While tremor has been studied extensively, the investigations thus far do not give detailed information on how the accuracy necessary for micromanipulations is affected while performing tasks in microsurgery and the life sciences. This paper systematically studies the effects of visual feedback, posture and grip force on the trial error and tremor intensity of subjects holding a forceps-like object to perform a pointing task. Results indicate that: (i) Arm support improves accuracy in tasks requiring fine manipulation and reduces tremor intensity in the 2-8 Hz region, but hand support does not provide the same effect; hence freedom of wrist movement can be retained without a significant increase in trial error. (ii) Magnification of up to x10 is critical to carry out accurate micromanipulations, but beyond that level, magnification is not the most important factor. (iii) While an appropriate grip force must be learned in order to grasp micro-objects, such as a needle, without damaging them, the level of grip force applied does not affect the endpoint accuracy.

Item Type:Article
Uncontrolled Keywords:Microscopy, manipulation, accuracy, posture, magnification, grip force, microsurgery
Subjects:Q Science > Q Science (General)
T Technology > T Technology (General)
Divisions:Biosciences and Bioengineering (Formerly known)
ID Code:13219
Deposited By: S.N.Shahira Dahari
Deposited On:21 Jul 2011 06:02
Last Modified:21 Jul 2011 06:02

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