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[Sensomotor function while wearing lumbar support ortheses].

K Pfeifer·L Vogt·J Klingler·M Portscher·W Banzer
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Abstract

AIM: Flexible lumbar corsets should contribute to an improved active and passive stabilisation of the lumbar spine. In the present study, the effects of flexible corsets on sensory-motor abilities have been investigated. METHODS: 24 healthy subjects (m = 10, f = 14, 26.7 years) performed angle- and force-reproduction tasks with and without wearing a flexible corset. The subjects tried to reproduce trunk flexion angles of 20 degrees und 40 degrees as well as forces of 33% and 66% of the maximum strength of the back extensor muscles. Additionally, muscular reactions were measured during destabilizing stimuli. RESULTS: No significant differences were found for the reproduction tasks. When wearing the corset, the left erector spinae muscles showed a delayed onset (+15 ms, p < 0.05), and the obliquus abdominis reached maximal activity more rapidly (-18 ms, p < 0.05). In the preinnervation phase the obliquus abdominis (-33%, p < 0.01), in the eccentric phase the erector spinae (-27%, p < 0.05) and the right obliquus abdominis (-46%, p < 0.05) and in the concentric phase the right obliquus abdominis (-35%, p < 0.01) and the rectus abdominis (-32%, p < 0.05) showed lower activities. CONCLUSION: The reduced muscle activities with destabilizing stimuli can be interpreted as the result of an improved passive stabilisation of the lumbar region by wearing a flexible corset.

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AdultBracesFemaleHumansIsometric ContractionLumbar VertebraeMaleRange of Motion, ArticularReference ValuesWeight-BearingEnglish AbstractJournal Article

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K Pfeifer, L Vogt, J Klingler, M Portscher, W Banzer. [Sensomotor function while wearing lumbar support ortheses].. https://doi.org/10.1055/s-2001-11865

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