title: Relationship between paraspinal muscle cross-sectional area and relative proprioceptive weighting ratio of older persons with lumbar spondylosis.
abstract: [Purpose] The purpose of this study was to examine the relationship between the paraspinal muscle cross-sectional area and the relative proprioceptive weighting ratio during local vibratory stimulation of older persons with lumbar spondylosis in an upright position. [Subjects] In all, 74 older persons hospitalized for lumbar spondylosis were included. [Methods] We measured the relative proprioceptive weighting ratio of postural sway using a Wii board while vibratory stimulations of 30, 60, or 240 Hz were applied to the subjects' paraspinal or gastrocnemius muscles. Back strength, abdominal muscle strength, and erector spinae muscle (L1/L2, L4/L5) and lumbar multifidus (L1/L2, L4/L5) cross-sectional areas were evaluated. [Results] The erector spinae muscle (L1/L2) cross-sectional area was associated with the relative proprioceptive weighting ratio during 60Hz stimulation. [Conclusion] These findings show that the relative proprioceptive weighting ratio compared to the erector spinae muscle (L1/L2) cross-sectional area under 60Hz proprioceptive stimulation might be a good indicator of trunk proprioceptive sensitivity.
authors: Division of Physical Therapy, Department of Health Science, Graduate School of International University of Health and Welfare, Japan ; National Center for Geriatrics and Gerontology, Japan.
authors: Tadashi
authors: T
authors: Ito
authors: National Center for Geriatrics and Gerontology, Japan.
authors: Yoshihito
authors: Y
authors: Sakai
authors: Nagoya Institute of Technology, Japan.
authors: Eishi
authors: E
authors: Nakamura
authors: Faculty of Clinical Engineering, School of Health Sciences, Fujita Health University, Japan.
authors: Kazunori
authors: K
authors: Yamazaki
authors: Nagoya Institute of Technology, Japan.
authors: Ayaka
authors: A
authors: Yamada
authors: Nagoya Institute of Technology, Japan.
authors: Noritaka
authors: N
authors: Sato
authors: Nagoya Institute of Technology, Japan.
authors: Yoshifumi
authors: Y
authors: Morita
keywords: Erector spinae muscle cross-sectional area; Older persons with lumbar spondylosis; Relative proprioceptive weighting ratio