Despite many efforts to control low-back pain problem it still continues to be a concern. Since the causation of low-back pain is under multifactorial control, it will always be the factor most vulnerable at a given time which will determine safety. The present study is an integrative inferential synthesis of the published work to discern the margin of safety. An attempt has been made to conclude, on the basis of objective evidence, an all encompassing criteria to ensure system safety. Though psychophysical approach integrates biomechanical and physiological variables the role of sensory conditioning needs to be addressed.
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References
1.
AdamsM.A.HuttonW.C.StottJ.R.R., (1980). The resistance to flexion of the lumbar inter-vertebral joint. Spine5(3), 245–253.
2.
AdamsM.A.HuttonW.C., (1986). Has the lumbar spine a margin of safety in forward bending. Clinical Biomechanics, 1, 3–6.
3.
AnderssonG., (1979). Low back pain in industry: Epidemiological aspects. Scand. J. Rehabil. Med.11(4), 163–168.
4.
AnderssonG.B.JSchultazA.B., (1979). Transmission of moments across the elbow joint and the lumbar spine. Journal of Biomechanics, 12, 747–755.
5.
AyoubM.M.DrydenR.D.McDanialJ.W.KnipferR.E.AghazadehF., (1978). Modeling of Lifting Capacity as a Function of Operator and Task Variables. In: Safety in Manual Materials Handling. DruryC. G., Ed. DHEW (NIOSH) Publication No. 78–185, pp 120–130.
6.
BrinckmannP.JohannelwelingN.HilwegD.BiggemannM., (1987). Fatigue fracture of human lumbar vertebrae. Clinical Biomechanics, 2, 94–97.
7.
BrinckmannP.BiggemannM.HilwegD., (1988). Fatigue fractures of human lumbar vertebrae. Clinical Biomechanics Supplement No. 1.
8.
BrownJ.R., (1972). Manual lifting and related fields. An annotated bibliography. Labour Safety Council of Ontarios.
9.
ChaffinD.B., (1975). On the validity of biomechanical models of the low-back for weight lifting analysis. The American Society of Mechanical Engineers, 1–13.
10.
ChaffinD.B.ParkK.S., (1973). A Longitudinal Study of Low Back Pain as Associated with Occupational Lifting Factors. Am. Ind. Hyg. Assoc. J., 34, 513–525.
11.
ChaffinD.B.HerrinG.D.KeyserlingW.M.GargA. (1977). A method for evaluating the biomechanical stresses resulting from manual materials handling jobs. Am. Ind. Hyg. Assoc. J.38, 662–675.
12.
EvansF.G.LissnerH.R. (1959). Biomechanical Studies on the Lumbar Spine and Pelvis. The Journal of Bone and Joint Surgery, 41A(2), 278–290.
13.
FrelvaldsA.ChaffinD.B.GargA.LeeK.S., (1984). A dynamic biomechanical evaluation of liting maximum acceptable loads. Journal of Biomechanics, 17, 251–262.
14.
GargA.SaxenaU., (1979). Effects of lifting frequency and technique on physical fatigue with special reference to psychophysical methodology and metabolic rate. Am. Ind. Hyg. Assoc. J.40, 894–903.
15.
HolbrookT.L.GraziesK.KelseyJ.StaufferR.N., (1984). The frequency of occurence, impact and cost of selected musculoskeletal conditions in the United States. American Academy of Orthopaedic Surgeons.
16.
HuttonW.C.AdamsM.A., (1982). Can the lumbar spine be crushed in heavy lifting?Spine, 7(6), 586–590.
17.
KelseyJ.L.WhiteA.A., (1980). Epidemiology and impact of low-back pain. Spine5, 133–142.
18.
KumarS., (1984). The physiological cost of three different methods of lifting in sagittal and lateral planes. Ergonomics27, 425–433.
19.
KumarS., (1989). Cumulative stress as a risk factor for back pain. Manuscript submitted to spine.
20.
KumarS.DavisP.R., (1983), Spinal loading in static and dynamic postures: EMG and intra-abdominal pressure study. Ergonomics, 26, 913–922.
21.
KumarS.ChaffinD.B.RedfernM., (1988). Isometric and isokinetic back and arm lifting strengths: Device and measurement. Journal of Biomechanics, 21, 35–44.
22.
MagoraA. (1970). Investigation of the relation between low back pain and occupation. I age sex community and other factors. Industr. Med. Surg.39, 465–471.
23.
MarrasW.S.RangarajuluS.L.LavenderS.A., (1987). Trunk loading and expectation. Ergonomics, 30, 551–562.
24.
MitalA., (1985). A comparison between psychophysical, and physiological approaches across low and high frequency ranges. Journal of Human Ergology, 14, 59–64.
25.
MitalA.KromodihardjoS., (1986). Kinetic analysis of manual lifting activities: Part II - Biomechanical analysis of task variables.
26.
NIOSH, (1981). Work practices Guide for Manual Lifting. Department of Health and Human Services.
27.
National Safety Council, (1978). Accident Facts.
28.
ParkK., (1973). A computerised simulation model of postures during manual materials handling. Ph.D. Dissertation, University of Michigan.
29.
SonodaT., (1962). Studies on the Compression, Tension, and Torsion Strength of the Human Vertebral Column. J. Kyoto Prefect Med. Univ., 71, 659–702.
30.
SnookS., (1978). The design of manual handling tasks. Ergonomics, 21, 963–985.
31.
SnookS.H.IrvineC.H.BassS.F., (1970). Maximum Weights and Workloads Acceptable to Male Industrial Workers. Am. Ind. Hyg. Assoc. J., 31, 579–586.
