The segment-dependent changes in lumbar intervertebral space height during flexion-extension motion

Fu, Mingyu; Ye, Q.; Jiang, Chunyu; Qian, Lei; Xu, Dan; Wang, Y.; Sun, Ping; Ouyang, Jun

doi:10.1302/2046-3758.64.bjr-2016-0245.r1

Cited by 6 publications

(7 citation statements)

References 29 publications

(28 reference statements)

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“…In vitro cadaveric tests have examined the biomechanical responses of the disc to external loads using various mechanical loading equipment setups. Fu et al [13] measured the segment-dependent changes in lumbar intervertebral space height during exion-extension motion in a custom-made mechanical loading equipment set-up. The author found that the changes in disc height at L4/5 were different from those at the L3/4 during exionextension motion.…”

Section: Discussionmentioning

confidence: 99%

“…Numerous studies have aimed to examine the lumbar complex structures and biomechanical behavior of the lumbar discs using both in vitro and in vivo approaches. [1][2][3][4][5][6][7][8][9][10][11][12][13]For example, sagittal magnetic resonance (MR) has been used to study the height of different disc components in the non-weight-bearing supine position, and to compare the segmental dependence. [14] In vivo motion of the lumbar spine has often been evaluated by using three-dimensional (3D) uoroscopic imaging and CT or MRI.…”

Section: Introductionmentioning

confidence: 99%

“…Cadaveric studies measured lumbar segment kinematics by applying six degrees of freedom (6DOF) using various mechanical loading equipment setups, with or without a compressive load. [3,10,12,13,[15][16][17] Finite element (FE) models have been developed to study lumbar disc deformation under various simulated loading conditions. [5,18] However, these only focused on the static anatomical characteristics or in vitro motion parameters.…”

Section: Introductionmentioning

confidence: 99%

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In Vivo Lumbar Intervertebral Disc Deformation During Lateral Bending Motion Under Different Load-Bearing Conditions

Wen

Zhang

et al. 2021

Preprint

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Background Lumbar Intervertebral Disc Degeneration (LDD) is one of the largest health worldwide problems, based on lost working time and associated costs. Inappropriate mechanical loading is considered to be an important factor in the development of LDD. L3-4 and L4-L5 were the commonly affected levels. Recent studies have measured geometric deformation of lumbar intervertebral discs during an in vivo functional weightbearing of the lumbar. The purpose of the present study was to determine the lumbar disc deformation in living human subjects during lateral bending motion under different load-bearing conditions. Methods 11 healthy subjects, 6 males and 5 females, aged 21 ≤ 39 years, with an average age of 30 ± 5 years, were recruited for the present study. Using the combination of dual fluoroscopic imaging system(DFIS)and CT, the sagittal images of L3-5 segments scanned by CT were transformed into three-dimensional reconstruction models and then matched to the instantaneous images of lumbar spine motion taken by a double fluorescent X-ray system under different loads. Motions were reproduced with the use of the combined imaging technique during left and right bending movements. Then, the kinematics data of the height, tension and compression deformation, and shear deformation of the lumbar intervertebral disc were obtained by using computer-related software. Result The data indicated that the tendency of tensile deformation during left and right bending was approximately symmetric. During the functional bending of the body, there was a greater compression deformation behind the same side of the movement and a higher tension deformation in front of the contralateral movement. The magnitude changed along the diagonal towards the posterolateral direction. During left bending, the upper vertebrae had a larger deformation range and tension deformation than the lower vertebrae. Meanwhile, it was not found that the small load had a significant effect on the tensile deformation of the intervertebral disc. Conclusion Lumbar disc deformation showed direction-specific and level-specific changes during lateral bending motion. These results could help understand the physiological motion characters of the lumbar spine and provide data support for other biomechanical studies.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In Vivo Lumbar Intervertebral Disc Deformation During Lateral Bending Motion Under Different Load-Bearing Conditions

Wen

Zhang

et al. 2021

Preprint

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“…Under the influence of tensile stress on the AF the disc subsequently becomes stiffer to enhance stability and support. The range of motion in normal physiological load bearing in a FSU varies directly with the vertebral height of disc and indirectly with the transverse diameter of the body of the vertebra [16,17]. Both vertebrae as well as IVDs are largest and thickest in the lumbar region making it a strong enough to bear the normal load in an erect posture.…”

Section: Anatomy and Biomechanics Of Lumar Fsumentioning

confidence: 99%

Asymptomatic Lumbar Spinal Motion Pathology

Sethi¹

2019

Health Sci J

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Low back pain is a disease entity with high prevalence and varied aetiology. The earlier reports by various researchers have defined osseous, ligamentous and muscular components as being important generators of pain. With advent of imaging modalities and diagnostic procedures it has been possible to target the source of pain in an individual. But there have been case where no pain manifestation is observed in individuals with deranged anatomy and physiology of the spine. This short review thus aims to look at presumptive factors which help to maintain a pain-less condition even with underlying pathology.

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“…Therefore, accuracy in MRI reports is very important. One of the effective factors in the accuracy of MRI reports is the medical history of patients in radiology request forms, which can be helpful or, on the other hand, lead to bias and haste in the writing of reports by residents, especially in educational centers with a high workload, so that the residents may use the histories and refrain from classic and systematic reading of MRI images, which would increase the number of false negative and false positive cases and, contrary to popular belief, reduce the accuracy of the reports [9], [10], [11], [12]. The radiologist does not have direct contact with the patient for medical history and physical examination, and thus, an incomplete and inaccurate history may also be misleading [13].…”

Section: Introductionmentioning

confidence: 99%

Association of History Taking and Accuracy of the Interpretation of Cervical and Lumbar Magnetic Resonance Imaging

Daghighi

Jafarabadi

Sefat

2020

Open Access Maced J Med Sci

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BACKGROUND: Disk herniation leading to radiculopathy is one of the most important causes of neck and back pain, requiring specific diagnostic tests. Magnetic resonance imaging (MRI) is one of these diagnostic methods. Interpreting the findings of this imaging method by an experienced skilled person is very important. AIM: The purpose of this study was to investigate the role of history on the accuracy of the lumbar or cervical MRI reports in patients with back and neck pain referring to the radiology department. METHODS: This study was performed on patients with complaints of lumbar or neck pain that MRI had been performed for them. At first, the MRI was studied by the residents of the 2nd and 3rd years and then a radiologist as a routine, respectively. From 4 to 6 months later, patients’ clinical history was presented to the same students and professors and MRI was re-reported. Statistical differences were evaluated and analyzed using SPSS software version 20. RESULTS: Out of 150 patients with mean age of 42.56 ± 10.65, 87 patients (58%) were female and 63 (42%) were male. Most of the patients were between the ages of 40 and 50 years (34.66%). The most common clinical symptom of patients was waist and neck pain followed by sensory disturbances of the extremities. The most pathologic changes found was disk bulging in 28.8% of patients (68 cases). In terms of lumbar canal stenosis, the most cases were in the L4-L5 levels of the moderate type. The most reported cases of cervical stenosis have been mild. Disk herniation and DOCP were two main factors causing canal stenosis in the study patients. Statistical difference in the MRI reports performed by the residents on most of the variables was statistically significant before and after knowing the clinical history of the patient (p < 0.05). However, this difference was less noted in the reports of the radiologists. CONCLUSION: The results of this study showed that knowing the history of patients in interpreting the results of MRI in patients with vertebral disk hernia is misleading and will lead to many false positive and negative results, especially for radiology residents. It is recommended that the residents and radiologists consider the MRI films before focusing on the biographies and clinical features of the patient, to prevent the occurrence of bias and to increase the accuracy of the reports.

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The segment-dependent changes in lumbar intervertebral space height during flexion-extension motion

Cited by 6 publications

References 29 publications

In Vivo Lumbar Intervertebral Disc Deformation During Lateral Bending Motion Under Different Load-Bearing Conditions

In Vivo Lumbar Intervertebral Disc Deformation During Lateral Bending Motion Under Different Load-Bearing Conditions

Asymptomatic Lumbar Spinal Motion Pathology

Association of History Taking and Accuracy of the Interpretation of Cervical and Lumbar Magnetic Resonance Imaging

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