Postural Control of the Lumbar Spine in Unstable Sitting

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Presentation transcript:

Postural Control of the Lumbar Spine in Unstable Sitting Richard A. Preuss, PT, MSc, Sylvain G. Grenier, PhD, Stuart M. McGill, PhD Archives of Physical Medicine and Rehabilitation Volume 86, Issue 12, Pages 2309-2315 (December 2005) DOI: 10.1016/j.apmr.2005.07.302 Copyright © 2005 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 1 Common balance patterns for (A) trial 1 and (B) trial 2 derived from PCA. Archives of Physical Medicine and Rehabilitation 2005 86, 2309-2315DOI: (10.1016/j.apmr.2005.07.302) Copyright © 2005 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 2 Distributions of lumbar spine side-flexion angle during sitting balance for 2 subjects, representing unimodal and bimodal balance patterns. Archives of Physical Medicine and Rehabilitation 2005 86, 2309-2315DOI: (10.1016/j.apmr.2005.07.302) Copyright © 2005 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 3 Binned histograms of balance data showing the distribution of quantitative sitting balance scores for the 2 trials. Archives of Physical Medicine and Rehabilitation 2005 86, 2309-2315DOI: (10.1016/j.apmr.2005.07.302) Copyright © 2005 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 4 Average levels of electromyographic activity during the 2 balance trials, in the 14 trunk muscles tested. Abbreviations: EO, external oblique; IO, internal oblique; LE, lumbar erector; LT, latissimus dorsi; MF, lumbar multifidus; RA, rectus abdominis; TE, thoracic erector. Archives of Physical Medicine and Rehabilitation 2005 86, 2309-2315DOI: (10.1016/j.apmr.2005.07.302) Copyright © 2005 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions