The effects of full motion forearm supports and a negative slope keyboard support system on hand-wrist posture were tested. No differences in posture were found between normal use of a keyboard and that with full motion forearm supports. Use of the negative slope keyboard support system increased body-to-screen distance and reduced wrist extension so that the wrist was vertically neutral for keyboarding.
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References
1.
ANSI/HFS 100–1988 (1988) American National Standard for Human Factors Engineering of Visual Display Terminal Workstations. (Santa Monica: Human Factors Society)
2.
ArmstrongT.J.ChaffinD.B. (1979a) Some biomechanical aspects of the carpal tunnel, Journal of Biomechanics, 12, 567–570
3.
ArmstrongT.J.ChaffinD.B. (1979b) Carpal tunnel syndrome and selected personal attributes, Journal of Occupational Medicine, 21, 481–486
4.
ArmstrongT.CastelliW.A.EvansF.G.PerezR.D. (1984) Some histological changes in carpal tunnel contents and their biomechanical implications. Journal of Occupational Medicine, 26, 197–201
5.
ChaffinD.B.AndersonG. (1984) Occupational Biomechanics, (New York: John Wiley and Sons)
6.
GrandjeanE. (1988a) The Ergonomics of Computerized Offices. (New York: Taylor and Francis)
7.
GrandjeanE. (1988b) Fitting the Task to the Man.4th ed., (New York: Taylor and Francis)
8.
MarrasW.S.SchoenmarklinR.W. (1991) Wrist motions and CTD risk in industrial and service environments, In QuéinnecY.DaniellouF., (eds.) Designing for Everyone: Proceedings of the Eleventh Congress of the International Ergonomics Association, 1, 36–38 (New York: Taylor and Francis)
9.
NiekerkG. (1992) Ergonomics of computing, Paper presented at the Addressing the Employee Health Crisis in Today's Computerized Office conference, June 24–25, Cornell University
10.
ParsonsC.A. (1991) Use of wrist rest by data input VDU operators, Contemporary Ergonomics 1991 — Proceedings of the Ergonomics Society's 1991 Annual Conference, 319–321 (London: Taylor and Francis)
PowersJ.R. (1991) Effects of full-motion forearm supports on keyboard operator hand-wrist posture, keyboarding performance, and keyboarding accuracy. Unpublished Master's Thesis, Dept. Design and Environmental Analysis, Cornell University
13.
Putz-AndersonV. (1988) Cumulative Trauma Disorders: A manual for musculoskeletal disorders of the upper limbs, (New York: Taylor and Francis)
14.
SauterS.L.SchleiferL.M.KnutsonS.J. (1991) Work posture, workstation design and musculoskeletal discomfort in a VDT data entry task, Human Factors, 33, 151–167
15.
SihvonenT.BaskinKHänninenO. (1989) Neck-shoulder loading in wordprocessor use: Effect of learning, gymnastics and armsupports, International Archives of Occupational Environmental Health, 61, 229–233
16.
StackB. (1987) Keyboard RSI: the practical solution. (Hobart: Meuden Press)
17.
StackB. (1998a,b) cited in Patkin, M. “Neck and arm pain in office workers: Causes and management”, In SauterS.L.DainoffM.J.SmithM.J. (eds.) Promoting health and productivity in the computerized office: models of successful ergonomic interventions, Chap. 13, 207–231, 1990 (New York: Taylor and Francis)
