Changes in Shear Modulus of the Lumbar Multifidus Muscle during Different Body Positions

Seyedali Sadeghi, Kevin Quinlan, Kirsten Elise Eilertson, Gregory Billy, Jesse Bible, Jaclyn Megan Sions, Daniel Humbe Cortes Correales

Research output: Contribution to journalArticle

Abstract

Multifidus function is important for active stabilization of the spine, but it can be compromised in patients with chronic low back pain and other spine pathologies. Force production and strength of back muscles are often evaluated using isometric or isokinetic tests, which lack the ability to quantify multifidi contribution independent of the erector spinae and adjacent hip musculature. The objective of this study is to evaluate localized force production capability in multifidus muscle using ultrasound shear wave elastography (SWE) in healthy individuals. Three different body positions were considered: lying prone, sitting up, and sitting up with the right arm lifted. These positions were chosen to progressively increase multifidus contraction and to minimize body motion during measurements. Shear modulus was measured at the superficial and deeper layers of the multifidus. Repeatability and possible sources of error of the shear modulus measurements were analyzed. Multifidus shear modulus (median (interquartile range)) increased from prone, i.e., 16.15 (6.69) kPa, to sitting up, i.e., 27.28 (15.72) kPa, to sitting up with the right arm lifted position, i.e., 45.02 (25.27) kPa. Multifidi shear modulus in the deeper layer of the multifidi was lower than the superficial layer, suggesting lower muscle contraction. Intraclass correlation coefficients (ICCs) for evaluation of shear modulus by muscle layer were found to be excellent (ICC = 0.76-0.80). Results suggest that the proposed protocol could quantify local changes in spinal muscle function in healthy adults; further research in patients with spine pathology is warranted.

Original languageEnglish (US)
Article number081003
JournalJournal of Biomechanical Engineering
Volume141
Issue number8
DOIs
StatePublished - Aug 1 2019

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Paraspinal Muscles
Muscle
Elastic moduli
Muscles
Spine
Pathology
Arm
Back Muscles
Elasticity Imaging Techniques
Shear waves
Muscle Contraction
Low Back Pain
Hip
Research Design
Stabilization
Ultrasonics
Research

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Physiology (medical)

Cite this

Sadeghi, Seyedali ; Quinlan, Kevin ; Eilertson, Kirsten Elise ; Billy, Gregory ; Bible, Jesse ; Sions, Jaclyn Megan ; Cortes Correales, Daniel Humbe. / Changes in Shear Modulus of the Lumbar Multifidus Muscle during Different Body Positions. In: Journal of Biomechanical Engineering. 2019 ; Vol. 141, No. 8.
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Changes in Shear Modulus of the Lumbar Multifidus Muscle during Different Body Positions. / Sadeghi, Seyedali; Quinlan, Kevin; Eilertson, Kirsten Elise; Billy, Gregory; Bible, Jesse; Sions, Jaclyn Megan; Cortes Correales, Daniel Humbe.

In: Journal of Biomechanical Engineering, Vol. 141, No. 8, 081003, 01.08.2019.

Research output: Contribution to journalArticle

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