Effect of changes in the lumbar posture in lifting on trunk muscle and spinal loads: A combined in vivo, musculoskeletal, and finite element model study

P Khoddam-Khorasani, N Arjmand… - Journal of biomechanics, 2020 - Elsevier
… At the L5-S1 level, the lordotic lumbar posture caused … musculature, ~14–27%), negligible
reductions in the maximum … while ligaments produced net anterior shear forces, especially in …

Biomechanical Effect of L4L5 Intervertebral Disc Degeneration on the Lower Lumbar Spine: A Finite Element Study

X Cai, M Sun, Y Huang, Z Liu, C Liu, C Du… - Orthopaedic …, 2020 - Wiley Online Library
decrease in motion of the L 4L 5 segment due to disc … von Mises stress and shear stress
in the annulus of the L 4L 5 … Third, the lack of lumbar muscle is a common shortcoming in …

Adjacent segments biomechanics following lumbar fusion surgery: A musculoskeletal finite element model study

M Ebrahimkhani, N Arjmand, A Shirazi-Adl - European Spine Journal, 2022 - Springer
L4L5 disc is considered in the preoperative state. Fat infiltration in muscles is represented
by reducing … compression and shear forces as well as global/local/total muscle forces (Figs. 2 …

Biomechanical contributions of spinal structures with different degrees of disc degeneration

F Cornaz, J Widmer, NA Farshad-Amacker, JM Spirig… - Spine, 2021 - journals.lww.com
… Furthermore, the preload of the spinal structures is reduced. … After removal of muscle and fat,
the segments were isolated … bending moments and pure shear forces. Further details on the …

Loads distributed in vivo among vertebrae, muscles, spinal ligaments, and intervertebral discs in a passively flexed lumbar spine

F Mörl, M Günther, JM Riede, M Hammer… - … and modeling in …, 2020 - Springer
ligament and passive muscle stiffnesses, extracted from well-established literature sources,
had to be distinctly reduced in order to approach our measured overall lumbar … of shear force

Biomechanical effects of lumbar fusion surgery on adjacent segments using musculoskeletal models of the intact, degenerated and fused spine

M Ebrahimkhani, N Arjmand, A Shirazi-Adl - Scientific Reports, 2021 - nature.com
… significantly reduced global and increased local muscle forces … , compression forces increased
by up to 21% and shear forces … in local shear forces depend on the alterations in the disc

[图书][B] A Ne W Method to Estimate the Impact on the L5/Si Spinal Disc from Speed Lifting of Unstable Loads, Asymmetrically

S Al-lababidi - 2020 - search.proquest.com
… to lower back pain among industrial workers, due to reduced … and shear forces on the L5/S1
disc lumbar disc while lifting … for evaluating muscle response activity at the L5/S1 disc. In the …

[HTML][HTML] Biomechanical Effect of Disc Height on the Components of the Lumbar Column at the Same Axial Load: A Finite-Element Study

JG Jeong, S Kang, GH Jung, M Cho, H Kim… - Journal of Healthcare …, 2022 - hindawi.com
disc height reduction may be beneficial for spinal health. … that the von-Mises stress or
shear stress applied to the annulus … erefore, strengthening of the paraspinal muscle through …

Lumbar spine loads are reduced for activities of daily living when using a braced arm-to-thigh technique

E Beaucage-Gauvreau, SCE Brandon… - European Spine …, 2021 - Springer
… The compression and AP shear forces at L4/L5 for the three tasks … on muscle recruitment
patterns and reduce possible … evaluate spinal loads at the lowermost spinal levels (L4/L5, L5/S1

[HTML][HTML] Invasiveness of decompression surgery affects modeled lumbar spine kinetics in patients with degenerative spondylolisthesis

M Kosterhon, A Müller, R Rockenfeller… - Frontiers in …, 2023 - ncbi.nlm.nih.gov
… biomechanics of vertebrae and intervertebral discs (IVDs) as … a reduction in anterior–posterior
shear forces within the IVDs … the influence of the musculature is on the shear forces after a …