Extent of nucleus pulposus migration in the annulus of porcine intervertebral discs exposed to cyclic flexion only versus cyclic flexion and extension / (Record no. 12925)
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| fixed length control field | 02047nas a22001937a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20210316163955.0 |
| 006 - FIXED-LENGTH DATA ELEMENTS--ADDITIONAL MATERIAL CHARACTERISTICS | |
| fixed length control field | m|||||r|||| 00| 0 |
| 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION | |
| fixed length control field | ta |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 171219t2012 sp ||||| |||| 00| 0 spa | |
| 022 ## - INTERNATIONAL STANDARD SERIAL NUMBER | |
| International Standard Serial Number | 0268-0033 |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | Salus Infirmorum |
| 245 00 - TITLE STATEMENT | |
| Title | Extent of nucleus pulposus migration in the annulus of porcine intervertebral discs exposed to cyclic flexion only versus cyclic flexion and extension /<br/><br/> |
| Statement of responsibility, etc. | Christian Balkovec, Stuart McGill |
| 500 ## - GENERAL NOTE | |
| General note | PDF en biblioteca |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE | |
| Bibliography, etc. note | Bibliografía: p.770 |
| 520 8# - SUMMARY, ETC. | |
| Summary, etc. | Background: Repeated flexion of an intervertebral disc has been identified as a mechanism to produce posterior herniations. Repeated extension under certain conditions has also been shown to cause the nucleus of partially herniated discs to reverse and migrate anteriorly. While research shows that the nucleus pulposus migrates anteriorly in extension and infiltrates the annulus posteriorly in flexion, it is not known if a cycle of flexion followed by a cycle of extension produces more or less annular damage compared to pure flexion alone.<br/>Methods: Two groups of porcine spinal motion segments were exposed to either repeated flexion with extension or just repeated flexion. Digitized photographs of dissected specimens enhanced with a radio-opaque blue dye enabled the quantification of the area of annulus infiltrated with nucleus pulposus.<br/>Findings: Specimens exposed to both flexion and extension showed significantly more annular damage and axial creep compared to those exposed to flexion alone.<br/>Interpretation: It would appear that while flexion alone can still cause nucleus pulposus to track through the annulus of an intervertebral disc, the effects are compounded when it is followed by a subsequent cycle of extension. Thus, movements which require both repetitive flexion and extension, have the potential to produce more annular damage than those which require merely flexion. |
| 773 ## - HOST ITEM ENTRY | |
| Related parts | -- 2012, v 27, p. 766-770 |
| Title | Clinical Biomechanics |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Universal Decimal Classification |
| Koha item type | Artículo de revista |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection code | Home library | Current library | Date acquired | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Universal Decimal Classification | Non-fiction | Revistas y artículos | Revistas y artículos | 30/10/2020 | PP | 5575 | 30/10/2020 | 30/10/2020 | Artículo de revista |