The examination of stress shielding in a finite element lumbar spine inclusive of the thoracolumbar fascia

Abstract

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The relationship between clinical examination measures and ultrasound measures of fascia thickness surrounding trunk muscles or lumbar multifidus fatty infiltrations: An exploratory study

“…If so, aerobic exercises may help, as this is the case for MFI (Tuñón‐Suárez et al, 2021). From a mechanical perspective, having fatty infiltration of the TLF may alter its elastic modulus, or ability to extend under a certain load, and thus have an important role in local load allocation (Newell & Driscoll, 2021a; Newell & Driscoll, 2021b). In Zugel et al (2018)'s consensus statement on PMCT research, researchers emphasized the need “to gain a deeper understanding of the mechanisms underlying the impact of treatments on fibrosis and fatty changes in fascial tissues”, referring to exercise, physical therapies or pharmacological approaches.…”

“…However, participants with CLBP may behave otherwise, preferentially using superficial abdominals (EO) because of reflex inhibition of deep abdominals (IO and TrA). Furthermore, selective inherent load bearing may become biases if such irregularities exist and further contribute to this potential detrimental cycle to tissue health (Newell & Driscoll, 2021a; Newell & Driscoll, 2021b).…”

“…If so, aerobic exercises may help, as this is the case for MFI (Tuñón-Suárez et al, 2021). From a mechanical perspective, having fatty infiltration of the TLF may alter its elastic modulus, or ability to extend under a certain load, and thus have an important role in local load allocation (Newell & Driscoll, 2021a;Newell & Driscoll, 2021b) (Delitto et al, 1995) and more specifically, with patients thought to have movement coordination impairment, segmental hypermobility or clinical lumbar instability (Cook et al, 2006;Delitto et al, 2012;Rabin et al, 2013). Aberrant movements are associated with decreased control of lumbar segment mobility in the mid-range portion of the lumbar ROM, as demonstrated by a fluoroscopic study of flexion and extension movements in the sagittal plane (Teyhen et al, 2007).…”

Development and model form assessment of an automatic subject-specific vertebra reconstruction method

“…However, current spine models for AR surgical navigation, VR surgical training platforms, and finite element analysis mainly come from two sides: (1) 3D models produced from anatomical human body dictionary database such as the BodyParts3D/Anatomography [5], where the spine polygon mesh files can be customized as per the research [48,49]; (2) 3D models reconstructed from subject-specific imaging data of CT and magnetic resonance imaging (MRI) [6]. This requires manual segmentation performed by professional radiologists, which is accurate but subjective and very time-consuming for annotations.…”

“…To obtain effective FEA results, two experiments were designed considering the biomechanics of human lumbar spine and were conducted on all the reconstructed The follower load was 1000 N which approximates the compression on the lumbar spine when standing and walking [121,122]. The bending moment was set to 7.5 N • m [49,123].…”