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  • 1
    Electronic Resource
    Electronic Resource
    Range of global motion of the cervical spine: intraindividual reliability and the influence of measurement device (2000)
    Springer
    European spine journal 9 (2000), S. 379-385 
    Details
    ISSN: 1432-0932
    Keywords: Key words Cervical spine ; Global mobilityMotion analysis devices ; Reliability ; CA6000
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Range of motion tests are often employed in the quantification of musculoskeletal impairment and in the assessment of the efficacy of therapeutic interventions. The aim of the present study was to compare the absolute values for, and the day-to-day reliability of, measures of cervical spinal mobility made with two computerised motion analysis devices. The ranges of cervical flexion, extension, lateral bending, axial rotation, and axial rotation in flexion and extension were determined for 19 volunteers using both the CA6000 Spine Motion Analyser and the Zebris CMS system; all measures were repeated on a second occasion 1–3 days later. The test-retest reliability was good for each instrument: there was no significant difference between the mean values derived on the two separate days (P〉0.05), and the corresponding intraclass correlation coefficients were 0.75–0.93 for all primary movements and 0.57–0.93 for axial rotation in flexion or in extension. For each primary movement, ¶a small but significant difference (1–10%; P〈0.05) between the values derived from the two instruments was observed, the systematic nature of which was revealed by the excellent correlation coefficients between them. For the measures of axial rotation in flexion or in extension, however, there was not only a poor correlation between the data obtained from the two devices, but the mean values also differed significantly. Each device is highly reliable in itself and can be used with confidence in longitudinal studies. The establishment of ‘normal’ values for the primary motions should take account of the slight differences observed between devices. Normal values for rotation in flexion or extension cannot be established until the source of the device-dependent difference is identified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005860000187
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of age and duration of symptoms on fibre type distribution and size of the back muscles in chronic low back pain patients (2000)
    Springer
    European spine journal 9 (2000), S. 273-281 
    Details
    ISSN: 1432-0932
    Keywords: Key words Chronic low back pain ; Erector spinae muscle ; MRI ; Muscle biopsy ; Fibre type ; distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Many studies have documented an association between chronic low back pain (LBP) and deficits in back muscle strength and endurance. The sub-optimal performance is believed to be the result of alterations in the size and structure of the muscle, although the long-standing issue of whether the observed changes precede or are a consequence of the pain remains unresolved. If consequent to the problem, and predominantly related to disuse of the muscles, then it may be expected that a relationship between muscle structure and symptom duration would exist. Lumbar paraspinal muscle samples were obtained from 59 chronic LBP patients using the percutaneous biopsy technique. The samples were subject to routine histochemical analysis for the examination of muscle fibre type characteristics and cytochemical architectural changes. In 55 of the patients, the gross cross-sectional areas of magnetic resonance images of the trunk muscles were also measured. Multivariate analysis showed that symptom duration was the strongest predictor of the individual proportions of the fast-fatigable type IIX fibres; with age and gender included in the model, nearly 30% of the variance in fibre type distribution could be accounted for. Duration of pain had no influence on fibre size. Gross muscle cross-sectional area correlated directly with lean body mass and inversely with age, but showed no relationship with symptom duration. Pathological changes in the internal fibre structure were more frequently encountered in older patients, and were independent of symptom duration. The results suggest that, over the long term, fibre type transformations rather than alterations in fibre size are the predominant changes to be found in the muscles of chronic LBP patients. The direction of change supports the results of many previous studies that have demonstrated corresponding differences in the fatigability of the muscles. There is a strong case for the early implementation of active measures to attempt to offset the development of these changes in back pain patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005860000189
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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