Measurements of lumbar spine kinematics in sitting postures using accelerometers: A preliminary study

Siti Ruzita Binti Mahmod, Mohammed Rafiq Bin Abdul Kadir, Devinder Kaur Ajit Singh, Raymond Y W Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Background & Aim: The best method of lumbar spine kinematic measurements in sitting is required to provide further information regarding the effects of sitting posture on low back pain. The aim of this study was to examine the errors and reliability of lumbar spine segmental kinematic measurements with two methods of calculation. Method: The newly calibrated tri-axial accelerometers were tested mechanically under dynamic and static conditions on 2 degrees of freedom goniometry arm assembled on a jig and electromagnetic motion sensors. The test for reliability of the sensors were extended on a participant who performed different static sitting positions (upright, slump, and hyperlordotic) and a dynamic sitting. Results: Single-accelerometer method in the dynamic testing resulted in root mean squared (RMS) differences ≤ 1.2° and intra-class correlation (ICC) =1 whereas RMS difference ≤ 1° were found when using double accelerometer method. However, in static testing, the RMS differences were higher in the latter method. An intra-class correlation coefficients (ICCs) ≥ 0.85 with Standard Error of Measurement (SEM) ≤ 0.43° was demonstrated during sitting in slump and upright using a single accelerometer. Using a double accelerometer demonstrated ICC ≥ 0.67 and SEM ≥ 0.48°. Discussion and Conclusion: The newly developed sensor system using single accelerometer is more reliable than double accelerometer in measuring lumbar spine kinematics in sitting postures of short durations.

Original languageEnglish
Title of host publicationi-CREATe 2013 - International Convention on Rehabilitation Engineering and Assistive Technology, in Conjunction with SENDEX 2013
Publisheri-CREATe
Publication statusPublished - 2013
Event7th International Convention on Rehabilitation Engineering and Assistive Technology, i-CREATe 2013, in Conjunction with SENDEX 2013 - Gyeonggi-do
Duration: 29 Aug 201331 Aug 2013

Other

Other7th International Convention on Rehabilitation Engineering and Assistive Technology, i-CREATe 2013, in Conjunction with SENDEX 2013
CityGyeonggi-do
Period29/8/1331/8/13

Fingerprint

Accelerometers
Kinematics
Sensors
Jigs
Degrees of freedom (mechanics)
Testing

Keywords

  • Accelerometer
  • Kinematics
  • Lumbar spine

ASJC Scopus subject areas

  • Software

Cite this

Mahmod, S. R. B., Abdul Kadir, M. R. B., Ajit Singh, D. K., & Lee, R. Y. W. (2013). Measurements of lumbar spine kinematics in sitting postures using accelerometers: A preliminary study. In i-CREATe 2013 - International Convention on Rehabilitation Engineering and Assistive Technology, in Conjunction with SENDEX 2013 i-CREATe.

Measurements of lumbar spine kinematics in sitting postures using accelerometers : A preliminary study. / Mahmod, Siti Ruzita Binti; Abdul Kadir, Mohammed Rafiq Bin; Ajit Singh, Devinder Kaur; Lee, Raymond Y W.

i-CREATe 2013 - International Convention on Rehabilitation Engineering and Assistive Technology, in Conjunction with SENDEX 2013. i-CREATe, 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mahmod, SRB, Abdul Kadir, MRB, Ajit Singh, DK & Lee, RYW 2013, Measurements of lumbar spine kinematics in sitting postures using accelerometers: A preliminary study. in i-CREATe 2013 - International Convention on Rehabilitation Engineering and Assistive Technology, in Conjunction with SENDEX 2013. i-CREATe, 7th International Convention on Rehabilitation Engineering and Assistive Technology, i-CREATe 2013, in Conjunction with SENDEX 2013, Gyeonggi-do, 29/8/13.
Mahmod SRB, Abdul Kadir MRB, Ajit Singh DK, Lee RYW. Measurements of lumbar spine kinematics in sitting postures using accelerometers: A preliminary study. In i-CREATe 2013 - International Convention on Rehabilitation Engineering and Assistive Technology, in Conjunction with SENDEX 2013. i-CREATe. 2013
Mahmod, Siti Ruzita Binti ; Abdul Kadir, Mohammed Rafiq Bin ; Ajit Singh, Devinder Kaur ; Lee, Raymond Y W. / Measurements of lumbar spine kinematics in sitting postures using accelerometers : A preliminary study. i-CREATe 2013 - International Convention on Rehabilitation Engineering and Assistive Technology, in Conjunction with SENDEX 2013. i-CREATe, 2013.
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