Richard A Graveling

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BACKGROUND Previous studies reported that, in non-degenerate discs, the nucleus pulposus migrates posteriorly during flexion and anteriorly during extension within the intervertebral disc. However, in these studies the differences between anterior and posterior distances have been regarded as an indicator of nucleus pulposus migration. This study(More)
The handling of mining supplies still involves manual lifting and carrying, some of which is, of necessity, carried out in restricted headroom conditions. Laboratory studies previously reported in the literature have shown that a reduction in ceiling height led to a progressive increase in truncal stress as measured by intra-abdominal pressure (IAP).(More)
Opportunities to evaluate spinal loading in vivo are limited and a large majority of studies on the mechanical functions of the spine have been in vitro cadaveric studies and/or models based on many assumptions that are difficult to validate. The purpose of this study was to investigate the feasibility of magnetic resonance imaging (MRI) in obtaining(More)
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