alexa Balance in chronic low back pain patients compared to healthy people under various conditions in upright standing.
General Science

General Science

Journal of Ergonomics

Author(s): Mientjes MI, Frank JS

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Abstract OBJECTIVE: To determine whether balance responses of chronic low back pain patients differed from healthy controls under various upright standing conditions which challenged the balance system. METHODS: Eight chronic low back pain patients and eight controls performed seven postural tasks which involved manipulation of visual, vestibular, and proprioceptive input as well as body orientation. The unbiased root mean square, the mean power frequency and the mean position of the centre of pressure were calculated from force plate readings. A pain scale and two questionnaires were used to evaluate the severity of disability and the scores were correlated with the force plate measures. The reliability of the force plate measures was determined. RESULTS: A significant increase in the root mean square in the medial-lateral direction for the chronic low back pain patients as a group was found during tasks which involved removal of vision, especially when combined with increased task complexity. The root mean square and mean power frequency in the medial-lateral plane were reliable for the majority of the tasks. CONCLUSION: The root mean square in the medial-lateral direction was reliable and sensitive enough to measure an increase in postural sway of chronic low back pain patients as a group compared to healthy controls when the task involved increased complexity and removal of visual information. RELEVANCE: A reliable measure of whole body performance obtained during simple postural tasks, such as the root mean square in the medial-lateral plane, may be used to distinguish chronic low back pain patients as a group from a healthy population. Further uses may include the development and guidance of chronic low back pain treatment and evaluation of recovery progress.
This article was published in Clin Biomech (Bristol, Avon) and referenced in Journal of Ergonomics

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