Kinetic Analysis of the Cervical Spinal Cord in Patients After Spinous Process-Splitting Laminoplasty Using a Kinematic Magnetic Resonance Imaging Technique

Miyata, Keisuke; Marui, Takashi; Miura, Junro; Yoshiya, Shinich; Fujii, Masahiko; Kurosaka, Masahiro; Doita, Minoru

doi:10.1097/01.brs.0000232788.72321.63

Cited by 13 publications

(7 citation statements)

References 16 publications

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“…Vertebral column kinematics is the study of the type and range of motion the vertebral column undergoes during normal movements . Kinematic studies can be performed in vivo and in vitro . Our group has worked to define the kinematic motion patterns of the canine cervical vertebral columns, with a particular emphasis on identifying differences between the cranial (C2–C4) and caudal (C5–C7) segments .…”

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confidence: 99%

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Effects of Flexion and Extension on the Diameter of the Caudal Cervical Vertebral Canal in Dogs

et al. 2014

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confidence: 99%

“…We found that the kinematics of the cranial and caudal cervical vertebral columns differed markedly with greater mobility in the caudal cervical vertebral column . Biomechanical examination of isolated vertebral segments has also been performed in dogs to quantify effects of surgical alterations to the vertebral column …”

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confidence: 99%

Effects of Flexion and Extension on the Diameter of the Caudal Cervical Vertebral Canal in Dogs

et al. 2014

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“…In a similar study, Miyata et al [ 18 ] report changing L-values in 40 patients who underwent laminoplasty for symptomatic CSM. 20 of these patients had preoperative dMRI images which were used for controls, for a total of 60 scans.…”

Section: Discussionmentioning

confidence: 86%

“…Our search returned 19 articles which met criteria for inclusion in this review [ 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 ], 7 of these were retrospective analyses; the remainder were prospective studies. 2661 total patients were included in this review, with an average age of 52.9 years (range, 15–93 years); 49.5% of patients were male ( Table 1 ).…”

Section: Resultsmentioning

confidence: 99%

The Role of Dynamic Magnetic Resonance Imaging in Cervical Spondylotic Myelopathy

Kolcun¹,

Chieng²,

Madhavan³

et al. 2017

Asian Spine J

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Dynamic spinal cord compression has been investigated for several years, but until the advent of open MRI, the use of dynamic MRI (dMRI) did not gain popularity. Several publications have shown that cervical cord compression is both static and dynamic. On many occasions the evaluation of cervical spondylotic myelopathy (CSM) is straightforward, but patients are frequently encountered with a significantly worse clinical examination than would be suggested by radiological images. In this paper, we present an extensive review of the literature in order to describe the importance of dMRI in various settings and applications. A detailed literature review was performed in the Medline and Pubmed databases using the terms “cervical spondylotic myelopathy”, “dynamic MRI”, “kinetic MRI”, and “myelomalalcia” for the period of 1980-2016. The study was limited to English language, human subjects, case series, retrospective studies, prospective reports, and clinical trials. Reviews, case reports, cadaveric studies, editorials, and commentaries were excluded. The literature search yielded 180 papers, 19 of which met inclusion criteria. However, each paper had evaluated results and outcomes in different ways. It was not possible to compile them for meta-analysis or pooled data evaluation. Instead, we evaluated individual studies and present them for discussion. We describe a number of parameters evaluated in 2661 total patients, including dynamic changes to spinal cord and canal dimensions, transient compression of the cord with changes in position, and the effects of position on the intervertebral disc. dMRI is a useful tool for understanding the development of CSM. It has found several applications in the diagnosis and preoperative evaluation of many patients, as well as certain congenital dysplasias and Hirayama disease. It is useful in correlating symptoms with the dynamic changes only noted on dMRI, and has reduced the incidence of misdiagnosis of myelopathy.

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“…Laminoplasty has also been used to manage the decreased space occupied by the spinal cord caused by spondylotic bars, intervertebral disc hernia, ossification of the posterior longitudinal ligament, and/or a constitutionally narrowing cervical spinal canal [2,5]. When dynamic factors further reduce the functional diameter of the spinal canal, this contributes to the development of cervical myelopathy [8,17]. Laminoplasty becomes a feasible posterior decompression procedure for the cervical spinal cord as an attempt to manage multisegmental cord compression.…”

Section: Discussionmentioning

confidence: 99%

Is extensive cervical laminoplasty an effective treatment for spinal cord sarcoidosis combined with cervical spondylosis?

Doita

Miyata

et al. 2009

Eur Spine J

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Patients with neurosarcoidosis are usually initially treated with steroid administration even when they have concomitant cord compression on magnetic resonance imaging (MRI). Operative intervention may be indicated in patients with spinal cord sarcoidosis requiring either tissue biopsy for diagnosis or associated with progressive neurologic symptoms. However, there have been no previous reports describing clinical outcomes of laminoplasty for spinal cord sarcoidosis. The objectives of this study are to investigate whether extensive cervical laminoplasty is an effective treatment for spinal cord sarcoidosis combined with spondylotic changes and/or cervical spinal canal stenosis. Open-door laminoplasty was performed in three patients with spinal cord sarcoidosis. All patients received intensive corticosteroid therapy after the operation MRI imaging was performed in all patients before and after the operation. Operative outcomes were not satisfactory and the clinical courses of the patients fluctuated after corticosteroid therapy. Daily life activities were not significantly improved after treatments in any of the three patients, and in the long-term follow-up period the clinical course of one patient was one of inexorable deterioration to a state of quadriplegia. The possibility of spinal cord sarcoidosis should be included in the differential diagnosis, when a distinct high signal intensity area is observed within the spinal cord on T2-weighted MR images in patients with spondylotic changes. Laminoplasty is not an effective intervention for the treatment of spinal cord sarcoidosis even when patients have spondylotic changes and/or a constitutionally narrowing cervical spinal canal. Patients with neurosarcoidosis should be treated first with steroid administration even when they have concomitant cord compression on MRI.

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Kinetic Analysis of the Cervical Spinal Cord in Patients After Spinous Process-Splitting Laminoplasty Using a Kinematic Magnetic Resonance Imaging Technique

Abstract: Spinous process-splitting laminoplasty increases the degree of freedom of the spinal cord.

Cited by 13 publications

References 16 publications

Effects of Flexion and Extension on the Diameter of the Caudal Cervical Vertebral Canal in Dogs

Effects of Flexion and Extension on the Diameter of the Caudal Cervical Vertebral Canal in Dogs

The Role of Dynamic Magnetic Resonance Imaging in Cervical Spondylotic Myelopathy

Is extensive cervical laminoplasty an effective treatment for spinal cord sarcoidosis combined with cervical spondylosis?

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