METHODOLOGICAL DEVELOPMENT OF A SIMULTANEOUS ASSESSMENT OF TRUNK MUSCLE ACTIVITY AND SPINAL LOADS
DURING STATIC HOLDING TASKS, AS A FUNCTION OF LOAD, TRUNK AND KNEE POSITION

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KAHRIZI S.; PARNIANPOUR M.; FIROUZABADI S.M.; KARIMI HOSSEIN; KAZEMNEJAD ANOUSHIRAVAN

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Journal: DANESHVAR MEDICINE Year:2004 | Volume:11 | Issue:49 Page(s): 47-62

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Title

METHODOLOGICAL DEVELOPMENT OF A SIMULTANEOUS ASSESSMENT OF TRUNK MUSCLE ACTIVITY AND SPINAL LOADS DURING STATIC HOLDING TASKS, AS A FUNCTION OF LOAD, TRUNK AND KNEE POSITION

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Keywords

KINETICQ1

KINEMATICQ2

EVALUATIONQ2

ELECTROMYOGRAPHYQ2

POSTUREQ2

LUMBAR SPINEQ4

Abstract

Numerous methods for KINETIC and KINEMATIC EVALUATION of LUMBAR SPINE have been developed. The aim of this study was to evaluate a methodology quantities and simultaneous measurements of trunk muscles recruitment pattern, biomechanical parameters of lumbar curve and prediction of internal load on the LUMBAR SPINE while holding loads at different hunk and knee positions. An inclinometer (Fredericks company, USA) and elastomer based sensor (Rubbery ruler, Innovonics company, Australia) were used to evaluate the curvature of LUMBAR SPINE, lordosis, while eight channel EMG system monitored the trunk muscle activities. A 3D static biomechanical model was used to predict the spinal compression and shear forces at L4-L5. Holding tasks of three level of load (0, 10, 20 kg), two level of knee position (45 and 0 degree flexion) and three level of trunk position (neutral, 15 and 30 degree flexion) were simulated for three male subjects. Both sensors were highly linear (p<0.0005) with acceptable accuracy. The reproducibility errors of the two tilt sensors a and b examined were 0.4 and 1.4 degrees respectively, while the reproducibility of rubbery ruler was 2.3 mm. The muscle activation profiles and biomechanical model agreed on the estimated level of stress on low back as a function of characteristics of holding task.

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APA: Copy

KAHRIZI, S., PARNIANPOUR, M., FIROUZABADI, S.M., KARIMI, HOSSEIN, & KAZEMNEJAD, ANOUSHIRAVAN. (2004). METHODOLOGICAL DEVELOPMENT OF A SIMULTANEOUS ASSESSMENT OF TRUNK MUSCLE ACTIVITY AND SPINAL LOADS DURING STATIC HOLDING TASKS, AS A FUNCTION OF LOAD, TRUNK AND KNEE POSITION. DANESHVAR MEDICINE, 11(49), 47-62. SID. https://sid.ir/paper/30568/en

Vancouver: Copy

KAHRIZI S., PARNIANPOUR M., FIROUZABADI S.M., KARIMI HOSSEIN, KAZEMNEJAD ANOUSHIRAVAN. METHODOLOGICAL DEVELOPMENT OF A SIMULTANEOUS ASSESSMENT OF TRUNK MUSCLE ACTIVITY AND SPINAL LOADS DURING STATIC HOLDING TASKS, AS A FUNCTION OF LOAD, TRUNK AND KNEE POSITION. DANESHVAR MEDICINE[Internet]. 2004;11(49):47-62. Available from: https://sid.ir/paper/30568/en

IEEE: Copy

S. KAHRIZI, M. PARNIANPOUR, S.M. FIROUZABADI, HOSSEIN KARIMI, and ANOUSHIRAVAN KAZEMNEJAD, “METHODOLOGICAL DEVELOPMENT OF A SIMULTANEOUS ASSESSMENT OF TRUNK MUSCLE ACTIVITY AND SPINAL LOADS DURING STATIC HOLDING TASKS, AS A FUNCTION OF LOAD, TRUNK AND KNEE POSITION,” DANESHVAR MEDICINE, vol. 11, no. 49, pp. 47–62, 2004, [Online]. Available: https://sid.ir/paper/30568/en

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