• Journal of Veterinary Clinics
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• v.18 no.3
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• pp.284-287
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• 2001

Three dogs referred to Veterinary Medical Teaching Hospital, Seoul National University were diagnosed as intervertebral disc disease. Physical examination, neurologic examination, survey radiograph, and myelography were performed in patients. Case 1 showed narrowing intervertebral space and calcified intervertebral disc material in survey radiograph. Case 2 showed increased opacity in the intervertebral opacity in survey radiograph. All of 3 cases showed extradural pattern during myelography. In survey radiography, radiographic signs consistent with intervertebral disc herniations include narrowing of the disc space and the dorsal intervertebral articular process joint space, small intervertebral foramen, increase opacity in the intervertebral foramen and extruded, mineralized disc material within the vertebral canal. Myelography is useful for evaluating the spinal cord and the cauda equina. Indication for myelography includes confirming a spinal lesion seen or suspected on survey radiograph, defining the extent of a survey lesion, finding a lesion not observed on survey radiograph, and distinguishing between surgical and nonsurgical lesion. In presentcases, two of three cases show radiographic signs of IVDD with survey radiograph and all of three case show extradural pattern during myelography. It is observed that intervertebral disc disease is one of the most important indication for radiographic examination and myelography of the vertebral column of small animals.

• The Journal of Korean Physical Therapy
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• v.15 no.2
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• pp.52-66
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• 2003

The intervertebral disc is a cartilaginous structure that resembles articular cartilage in its biochemistry, but morphologically it is clearly different. It shows degenerative and ageing changes earlier than does any other connective tissue in the body, It is believed to be important clinically because there is an association of disc degeneration with back pain. Degenerative changes in the intervertebral disc are thought to develop as aging, mechanical stress and metabolic factors. Genetic factors may also play a part in the onset or progress of the degenerative process. They, together with environmental factors, may act as determinants of the structural characteristics of the intervertebral disc and produce a tendency to generation, In this short review we outline the morphplogy and biochemistry of normal intervertebral disc and the changes that arise during degeneration. Therefore this study will review degeneration of intervertebral disc, so we will have knowledge about low back pain associated with degenerative change in the intervertebral disc.

• The Korean Journal of Pain
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• v.23 no.1
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• pp.51-54
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• 2010

A herniated intervertebral disc is the most common type of soft tissue mass lesion within the lumbar spinal canal. Magnetic resonance imaging (MRI) is a useful tool for the assessment of patients with lower back pain and radiating pain, especially intervertebral disc herniation. MRI findings of intervertebral disc herniation are typical. However, from time to time, despite an apparently classic history and typical MRI findings suggestive of disc herniation, surgical exploration fails to reveal any lesion of an intervertebral disc. Our patient underwent lumbar disc surgery with the preoperative diagnosis of lumbar disc herniation; however, nothing could be found during the surgical procedure, except a swollen nerve root.

• Journal of Korean Medicine Rehabilitation
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• v.19 no.2
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• pp.203-212
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• 2009

Objectives : Spurling test is one of the most widely used physical tests to diagnose herniated cervical intervertebral disc. The purpose of this study is to analyse diagnostic validity of Spurling test. Methods : This study was carried out on 382 subjects who visited Bu-Chun Ja-Seng oriental hospital with the neck pain or radiating pain from neck to upper extremities from November, 2007 to October, 2008. All subjects underwent both Spurling test and cervical magnetic resonance imaging(MRI). The associations between Spurling test and herniated cervical intervertebral disc were analysed. Results : 1. The sensitivity of Spurling test for herniated cervical intervertebral disc was 64%. 2. The specificity of Spurling test for herniated cervical intervertebral disc was 86%. 3. The positive predictive value of Spurling test for herniated cervical intervertebral disc was 93%. 4. The negative predictive value of Spurling test for herniated cervical intervertebral disc was 44%. Conclusions : This study suggests that Spurling test is not useful in screening for herniated cervical intervertebral disc due to the test's relatively low sensitivity. Thus it is necessary to consult advanced tests such as diagnostic imaging to diagnose herniated cervical intervertebral disc.

• Journal of Veterinary Clinics
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• v.40 no.1
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• pp.38-43
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• 2023

This study compared the degree of disc degeneration of intervertebral disc between normal disc and disc disease using Magnetic Resonance images of tholacolumbar and lumbar vertebrae in dogs. The sample population consisted of 72 dogs and 188 intervertebral discs. These dogs were divided into four groups according to MRI criteria: normal, disc protrusion, disc extrusion, and fibrocartilaginous embolism. The Pfirrmann classification developed by Pfirrmann for use in human medicine was used to assess the degree of disc degeneration. Statistical analysis revealed that disc diseases had a significant difference in the degree of disc degeneration compared to normal discs in the intervertebral disc. Fibrocartilaginous embolism was found to have a relatively low disc degenerative change compared to two other disc disease groups, disc protrusion and disc extrusion. Disc degeneration in the disc extrusion group was slightly higher than that in the disc protrusion group, although the difference between the two groups was not statistically significant.

• Journal of Veterinary Clinics
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• v.20 no.4
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• pp.519-522
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• 2003

An appearance of herniated intervertebral disc into thoracolumbar vertebral canal was evaluated in two patients using computed tomography (CT). Before CT scanning, plain radiography and myelography were performed in both cases. CT images were compared to those of myelography. Dogs were positioned in sternal recumbency under inhalation anesthesia and transverse slices with 2 mm thickness were obtained around thoracolumbar region. The transverse CT images were examined using both vertebral and spiral window mode. The most common findings on CT images were loss of vertebral canal epidural fat, bulging of vertebral canal disc margins, displacement of spinal cord and flatted vertebral canal. Whereas, narrowed intervertebral disc space and simple extradural pattern were the main findings on plain and contrast radiographs. CT imges showed the extent of the herniated disc lesion, type II intervertebral disc hernation, and the displacement of spinal cord in detail in both occations. It is considered that degree and precise localization of the intervertebral disc herniation and subtle lesion of spinal cord could be identified accurately using computed tomography.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.26 no.2
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• pp.234-242
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• 2002

A shape optimal design of synthetic intervertebral disc prosthesis is performed using a three-dimensional finite element method. Geometric parameters are introduced to model the cross-sectional geometry of the intervertebral disc. It is assumed that the total strain energy in the intact intervertebral disc is minimized under the normal load conditions, as often cited in other references. To calculate the stain energy density, both the nonlinear material properties and the large deformations are taken into account. The design variables of the annulus fiber angle and the area ratio of the nucleus pulposus are calculated as 31°and 30%, respectively, which complies well with the intact disc. Thus, the same optimization procedure is applied to the design of the synthetic intervertebral disc prosthesis whose material properties are different from the intact disc. For the given synthetic material properties, the values of 67°and 24% for the fiber angle and the area ratio are obtained.

• Journal of Korean Medicine Rehabilitation
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• v.25 no.4
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• pp.75-81
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• 2015

Objectives To investigate the relationship between cervical intervertebral space narrowing in the X-ray and HIVD level of cervical spine in the CT image. Methods We studied 101 subjects who were taken cervical spine X-ray and CT. Intervertebral space were measured at the anterior, middle and posterior portion of each cervical disc in the X-ray. Considering individual difference, intervertebral space was set as value divided by upper width of lower vertebral body. We analyzed statistically adjusted intervertebral space of normal group and herniated disc group using student' t t-test. Results Intervertebral space of cervical spine was narrowed in the herniated disc group. But there was no significant difference at C2~C3. Conclusions We found that narrowing intervertebral space of cervical spine is associated with herniated disc. Further clinical observation is needed.

• The Journal of Korean Physical Therapy
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• v.2 no.1
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• pp.103-112
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• 1990

The intervertebral disc in the anterior portion of the function unit gives the spine its flexibility. The disc is attached closely to the vertebral endplates. Between these endplates and the annulus fibrosus, the nucleus pulposus of the lumbar disc is enclosed in a circle of unyielding tissues. Compressive pressure placed on the disc is dissipated circumferentially in a passive manner In response to the greater axial forced exerted on the lumbar spine in comparison to the cervical and thoracic spines, the nucleus pulposus has its greatest surface area in the lumbar spine. The intervertebral disc is not only structure that helps diss pate stresses placed on the spine. With flexion, extension, rotation, or shear stress, the load distribution on the function unit is shared by the intervertebral disc, anterior and posterior longitudinal ligaments, the facet joints and capsules, and other ligamentous structures like the ligamentum flavum, interspinous and supraspinous ligaments, which attach to the posterior elements of the functional unit.

• Journal of Pharmacopuncture
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• v.14 no.3
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• pp.99-107
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• 2011

Objectives : The purpose of this study is to report the image changes of two cases of Lumbar intervertebral Disc Sequestration after oriental medical treatment. Methods : We examined 2 patients with Lumbar intervertebral Disc Sequestration who showed changes on MRI images before/after the treatment. And we assessed clinical symptoms by using numeric rating scale(NRS) and straight leg raising test(SLRT). Results & Conclusions : In this study, the first MRI examination of Lumbar intervertebral Disc Sequestration patients was performed at the first visit and re-examination of MRI was done after treatment. In each case, the size of the disc sequestration was considerably reduced in MRI image. And both patients represented effective improvment in NRS score and SLRT test angle.