The slow and fast components of postural sway in chronic neck pain
2011 (English)In: Manual Therapy, ISSN 1356-689X, E-ISSN 1532-2769, Vol. 16, no 3, 273-278 p.Article in journal (Refereed) Published
Objective: To evaluate the slow and fast components of postural control in quiet stance in subjects with chronic neck pain, associations between postural sway and self-rated characteristics and to study the impact of anthropometrics on postural sway.
Design: A single-blinded cross-sectional study including two separate data collections.
Subjects: Sample 1: Persons with chronic non-specific neck pain (NS, n=24), whiplash associated disorders (WAD, n=21). Healthy subjects were controls (CON, n=21). Sample 2: Women only, 98 NS and 32 CON subjects.
Methods: Subject performed a quiet stance test with eyes closed on a force platform while the center of pressure (CoP) trajectory was measured. Sample 1 was tested on a firm surface for 30 seconds, while sample 2 was tested on both firm and foam surfaces for 190 seconds. The CoP signal was decomposed into the slow and fast components and the magnitude of these signals were calculated. Anthropometrics were included as covariate in the analysis of group differences if correlated with postural sway variables. Group differences in the sway variables were evaluated, as well as association between postural sway and self-ratings of symptoms, functioning and kinesiophobia.
Results: Increased magnitude of the slow sway component was found for both neck pain groups. Increasing age was associated with increased magnitude of the fast component. Surface conditions had no effect on group difference. For WAD, associations were found between the magnitude of the slow component and self-rated characteristics related to physical functioning, sensory alterations and psychosocial functioning. For NS, concurrent low back pain was associated with increased postural sway.
Conclusion: Postural control can be altered in chronic neck pain. This effect was present only for the slow sway component, which implies aberration in sensory feedback or processing of sensory information. Associations between postural sway and self-rated characteristics in WAD support the clinical validity of postural control assessment in this group. Increased postural sway found in NS with concurrent low back pain suggests an important role of generalised spinal pain on postural control alterations.
Place, publisher, year, edition, pages
2011. Vol. 16, no 3, 273-278 p.
Neck pain, Whiplash injuries, Low back pain, Musculoskeletal disorders, Postural control
Research subject Rehabilitation Medicine
IdentifiersURN: urn:nbn:se:umu:diva-22672DOI: 10.1016/j.math.2010.11.008PubMedID: 21185768OAI: oai:DiVA.org:umu-22672DiVA: diva2:217579
Manuscript included in medical doctorial thesis2009-05-142009-05-142015-01-20Bibliographically approved