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Conference Paper: Linear modelling and Fourier spectroscopy of stress-relaxation in the cervical spine

TitleLinear modelling and Fourier spectroscopy of stress-relaxation in the cervical spine
Authors
KeywordsMedical sciences
Computer applications
Issue Date1998
PublisherIEEE.
Citation
The 20th IEEE Engineering in Medicine and Biology Society Conference Proceedings, Hong Kong, China, 29 October - 1 November 1998, v. 5, p. 2509-2511 How to Cite?
AbstractSingle joints of the cervical spine were subject to axial compressive loads and the load relaxation recorded for 15 minutes. Isochronal plots of stress against strain were plotted for each specimen and showed high linear correlation coefficients (>0.955). Accordingly, a linear model was chosen and fitted to data obtained from a fuller range (3 hours) of the complete relaxation curve. The relaxation times extracted from this model were approximately 10 minutes and 5 hours. Fourier transform of the relaxation curve allows the storage modulus and the loss modulus of the relaxation spectrum to be shown separately as functions of frequency. Fourier analysis shows that the cervical spine has a wide and smooth distribution of relaxation times. Examination of the higher frequency components of the relaxation in the region of 1 to 20 Hz show the loss modulus to be almost flat and tending towards zero. This work shows that while the disc is capable of dissipating a large proportion of the applied strain energy, it can only do this slowly, and the discs of the cervical spine are inefficient as `shock absorbers' of axial loads.
Persistent Identifierhttp://hdl.handle.net/10722/46937
ISSN

 

DC FieldValueLanguage
dc.contributor.authorHolmes, ADen_HK
dc.contributor.authorFang, Jen_HK
dc.date.accessioned2007-10-30T07:01:48Z-
dc.date.available2007-10-30T07:01:48Z-
dc.date.issued1998en_HK
dc.identifier.citationThe 20th IEEE Engineering in Medicine and Biology Society Conference Proceedings, Hong Kong, China, 29 October - 1 November 1998, v. 5, p. 2509-2511en_HK
dc.identifier.issn1557-170Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/46937-
dc.description.abstractSingle joints of the cervical spine were subject to axial compressive loads and the load relaxation recorded for 15 minutes. Isochronal plots of stress against strain were plotted for each specimen and showed high linear correlation coefficients (>0.955). Accordingly, a linear model was chosen and fitted to data obtained from a fuller range (3 hours) of the complete relaxation curve. The relaxation times extracted from this model were approximately 10 minutes and 5 hours. Fourier transform of the relaxation curve allows the storage modulus and the loss modulus of the relaxation spectrum to be shown separately as functions of frequency. Fourier analysis shows that the cervical spine has a wide and smooth distribution of relaxation times. Examination of the higher frequency components of the relaxation in the region of 1 to 20 Hz show the loss modulus to be almost flat and tending towards zero. This work shows that while the disc is capable of dissipating a large proportion of the applied strain energy, it can only do this slowly, and the discs of the cervical spine are inefficient as `shock absorbers' of axial loads.en_HK
dc.format.extent308179 bytes-
dc.format.extent1820 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.subjectMedical sciencesen_HK
dc.subjectComputer applicationsen_HK
dc.titleLinear modelling and Fourier spectroscopy of stress-relaxation in the cervical spineen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1557-170X&volume=5&spage=2509&epage=2511&date=1998&atitle=Linear+modelling+and+Fourier+spectroscopy+of+stress-relaxation+in+the+cervical+spineen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/IEMBS.1998.744955en_HK
dc.identifier.hkuros45189-

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