In vivo intervertebral kinematics and disc deformations of the human cervical spine during walking

Zhou, Chaochao; Li, Guoan; Wang, Haiming; Yu, Yan; Tsai, Tsung-Yuan; Cha, Thomas

doi:10.1016/j.medengphy.2020.11.010

Cited by 9 publications

(9 citation statements)

References 33 publications

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“…The tracking method is strictly dependent upon the accuracy in sensor identification from the US volumes (Section II-B). Thus, we computed the difference 𝐸 of absolute distances 𝐷 between sensor pairs 𝑆 𝑖 𝑆 𝑗 with 𝑖, j = 1, 2, 3, as in (6).…”

Section: F Error Measurementsmentioning

confidence: 99%

“…However, exposure to ionizing radiation poses health risks and is not ethical for use in a healthy population. More recently, other imaging modalities including fluoroscopy and Magnetic resonance imaging (MRI) have demonstrated acceptable measurements of motion [4,5,6]. Limitations of these imaging techniques are that the equipment of a bi-planar fluoroscopy system and standing MRI devices are extremely costly and are unlikely to be used for larger clinical studies.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of spinal curvatures in static postures using localized 3D ultrasound: A proof-of-concept study

Meszaros-Beller¹,

Antico²,

Fontanarosa³

et al. 2022

Preprint

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<div>Measurement of vertebral spinal motion is a difficult endeavor given the lack of reachable bony landmarks for placement of reflective markers for common optoelectronic systems and large skin movement artifacts along the spine affecting the accuracy of surface-mounted techniques. The objective of this proof-of-concept study was to develop an experimental framework to assess spinal curvatures with high accuracy by using ultrasound (US) imaging. A phantom spine model (T1-T12) immersed in water was scanned using both Magnetic resonance imaging (MRI) and three dimensional (3D) US. The US scans were obtained for the phantom spine in different postures while the US probe was localized by three electromagnetic tracking sensors (NDI system) attached to the probe head and later identified on the acquired US volumes via visual inspection. Spinal landmarks were selected on the US images and validated using US-MRI registration. Their position was then related to the position of the tracking sensors, enabling the precise localization of landmarks and reconstruction of spinal curvatures in a global reference frame. The obtained anatomical reconstructions were further refined using an automatic registration algorithm and validated by an experienced sonographer (ground-truth solution). Results of this study show that localized 3D US enables tracking of spinal landmarks and allows for an accurate reconstruction of static postures. A high reliability in sensor identification of 0.49 mm was found on average while the inter-observer variability was strongly correlated to the intra-observer error with maximum deviance of 0.8 mm. The NDI-based spine reconstruction had a mean error of 5.6 mm compared to the ground-truth, which is significantly lower than errors obtained by current gold standards (>10 mm). Combining US probe tracking and semi-automatic registration methods anatomical reconstructions comparable to clinical standards were obtained. This study implies that US holds the potential for advancing vertebral motion assessment and the reconstruction of spinal curvatures. In future, this could overcome limitations of marker-based approaches.</div>

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Section: F Error Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of spinal curvatures in static postures using localized 3D ultrasound: A proof-of-concept study

Meszaros-Beller¹,

Antico²,

Fontanarosa³

et al. 2022

Preprint

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“…Now, it may be stressed that during locomotion, trunk accelerations might potentially destabilise the head-in-space position 17 . However, head-in-space position has been shown to remain highly stable during locomotor tasks such as gait initiation 17 , free walking 29 , walking in place, running in place and hopping 30 – 33 . Based on this evidence, it has been proposed that the head, which contains the visual and vestibular systems, forms a frame of reference for the perception of movement, control of limb coordination and body balance 32 , 34 .…”

Section: Introductionmentioning

confidence: 99%

Effects of experimentally induced cervical spine mobility alteration on the postural organisation of gait initiation

Delafontaine

Vialleron

Diakhaté

et al. 2022

Sci Rep

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Gait initiation (GI), the transient period between quiet standing and locomotion, is a functional task classically used in the literature to investigate postural control. This study aimed to investigate the influence of an experimentally-induced alteration of cervical spine mobility (CSM) on GI postural organisation. Fifteen healthy young adults initiated gait on a force-plate in (1) two test conditions, where participants wore a neck orthosis that passively simulated low and high levels of CSM alteration; (2) one control condition, where participants wore no orthosis; and (3) one placebo condition, where participants wore a cervical bandage that did not limit CSM. Centre-of-pressure and centre-of-mass kinematics were computed based on force-plate recordings according to Newton’s second law. Main results showed that anticipatory postural adjustments amplitude (peak backward centre-of-pressure shift and forward centre-of-mass velocity at toe-off) and motor performance (step length and forward centre-of-mass velocity at foot-contact) were altered under the condition of high CSM restriction. These effects of CSM restriction may reflect the implementation of a more cautious strategy directed to attenuate head-in-space destabilisation and ease postural control. It follows that clinicians should be aware that the prescription of a rigid neck orthosis to posturo-deficient patients could exacerbate pre-existing GI deficits.

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“…Recent studies have demonstrated that the motion tracking technique based on dual fluoroscopic imaging is a reliable method for determining intervertebral motion and adjacent segment kinematics in various functional spine motions ( Wawrose et al, 2020 ; Zhou et al, 2020 ). Therefore, in this study, we used a DFIS combined with a validated 3D-to-2D registration technique ( Wang et al, 2020 ; Zhou et al, 2021 ) to quantify in vivo intervertebral and upper-lower lumbar segment kinematics in asymptomatic subjects during forward–backward bending.…”

Section: Introductionmentioning

confidence: 99%

Lumbar segment-dependent soft tissue artifacts of skin markers during in vivo weight-bearing forward–Backward bending

Ling

et al. 2022

Front. Bioeng. Biotechnol.

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Traditional optical motion capture (OMC) with retroreflective markers is commonly used to measure joint kinematics but was also reported with unavoidable soft tissue artifacts (STAs) when quantifying the motion of the spine. Additionally, the patterns of the STA on the lumbar spine remain unclear. This study aimed to 1) quantify the in vivo STAs of the human lower back in three-dimensional directions during weight-bearing forward–backward bending and 2) determine the effects of the STAs on the calculated flexion angles between the upper and lower lumbar spines and adjacent vertebrae by comparing the skin marker (SM)- and virtual bone marker (VM)-based measurements. Six healthy volunteers were imaged using a biplanar radiographic system, and thirteen skin markers were mounted on every volunteer’s lower back while performing weight-bearing forward–backward bending. The STAs in the anterior/posterior (AP), medial/lateral (ML), and proximal/distal (PD) directions were investigated. The flexion angles between the upper and lower lumbar segments and adjacent intervertebral segments (L2–L5) throughout the cycle were calculated. For all the participants, STAs continuously increased in the AP direction and exhibited a reciprocal trend in the PD direction. During flexion, the STA at the lower lumbar region (L4–L5: 13.5 ± 6.5 mm) was significantly higher than that at the upper lumbar (L1–L3: 4.0 ± 1.5 mm) in the PD direction (p < 0.01). During extension, the lower lumbar (L4–L5: 2.7 ± 0.7 mm) exhibited significantly less STAs than that exhibited by the upper lumbar region (L1–L3: 6.1 ± 3.3 mm) (p < 0.05). The STA at the spinous process was significantly lower than that on both sides in the AP direction (p < 0.05). The present results on STAs, based on dual fluoroscopic measurements in healthy adult subjects, presented an anatomical direction, marker location, and anatomic segment dependency, which might help describe and quantify STAs for the lumbar spine kinematics and thus help develop location- and direction-specific weighting factors for use in global optimization algorithms aimed at minimizing the effects of STAs on the calculation of lumbar joint kinematics in the future.

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In vivo intervertebral kinematics and disc deformations of the human cervical spine during walking

Cited by 9 publications

References 33 publications

Assessment of spinal curvatures in static postures using localized 3D ultrasound: A proof-of-concept study

Assessment of spinal curvatures in static postures using localized 3D ultrasound: A proof-of-concept study

Effects of experimentally induced cervical spine mobility alteration on the postural organisation of gait initiation

Lumbar segment-dependent soft tissue artifacts of skin markers during in vivo weight-bearing forward–Backward bending

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