| Whole-spine dynamic magnetic resonance study of contortionists: anatomy and pathology. | |
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MedLine Citation:
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PMID: 18518669 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECT: Whole-spine magnetic resonance (MR) images were obtained using a cylindrical 3-T MR imaging system in 5 contortionists to assess the pathological changes possibly associated with the practice of contortion. Whole-spine dynamic MR images were obtained using a 1-T open MR imaging system in 2 of these contortionists with the purpose of defining the range of motion (ROM) achieved during extreme contortion. The range of spinal motion in this unique population was then quantified. METHODS: The study included 5 female contortionists 20-49 years of age. Imaging was performed using open 1-T and cylindrical 3-T high-field MR imaging systems. Data were viewed and analyzed with DICOM-compliant tools. Real-time, dynamic, and standard MR imaging allowed for quantification of the contortionists' ROM. RESULTS: There was a difference of 238 degrees between full spinal extension and full flexion. Three of the 5 contortionists had 4 anterosuperior limbus vertebrae at T-11 and the upper lumbar levels. CONCLUSIONS: Whole-spine dynamic MR imaging is a valuable tool for the evaluation of the extreme ROM in contortionists, allowing for the quantification of extreme mobility. The limbus fractures present in 3 of the 5 contortionists is postulated to be due to avulsion on hyperextension. Future research may open the use of whole-spine dynamic MR imaging into such areas as pain management and traumatic spinal injuries. |
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Authors:
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Randal R Peoples; Thomas G Perkins; Janette W Powell; Eric H Hanson; Travis H Snyder; Timothy L Mueller; William W Orrison |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of neurosurgery. Spine Volume: 8 ISSN: 1547-5654 ISO Abbreviation: - Publication Date: 2008 Jun |
Date Detail:
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Created Date: 2008-06-03 Completed Date: 2008-06-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101223545 Medline TA: J Neurosurg Spine Country: United States |
Other Details:
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Languages: eng Pagination: 501-9 Citation Subset: IM |
Affiliation:
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Las Vegas Neurosurgery and SpineCare, Las Vegas, Nevada, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Cervical Vertebrae / pathology Female Humans Intervertebral Disk / pathology Intervertebral Disk Displacement / pathology, physiopathology Joint Instability / pathology, physiopathology Lordosis / pathology Lumbar Vertebrae / pathology Magnetic Resonance Imaging / methods* Middle Aged Range of Motion, Articular / physiology Scoliosis / pathology, physiopathology Spinal Diseases / pathology*, physiopathology Spinal Osteophytosis / pathology, physiopathology Spine / anatomy & histology*, physiology Spondylarthritis / pathology, physiopathology Sports* / physiology Thoracic Vertebrae / pathology Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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