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contributor authorSadeghi, Seyedali
contributor authorQuinlan, Kevin
contributor authorEilertson, Kirsten E.
contributor authorBilly, Gregory G.
contributor authorBible, Jesse
contributor authorSions, Jaclyn Megan
contributor authorCortes, Daniel H.
date accessioned2019-09-18T09:07:55Z
date available2019-09-18T09:07:55Z
date copyright5/6/2019 12:00:00 AM
date issued2019
identifier issn0148-0731
identifier otherbio_141_08_081003
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4259229
description abstractMultifidus 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.
publisherAmerican Society of Mechanical Engineers (ASME)
titleChanges in Shear Modulus of the Lumbar Multifidus Muscle During Different Body Positions
typeJournal Paper
journal volume141
journal issue8
journal titleJournal of Biomechanical Engineering
identifier doi10.1115/1.4043443
journal fristpage81003
journal lastpage081003-7
treeJournal of Biomechanical Engineering:;2019:;volume( 141 ):;issue: 008
contenttypeFulltext


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