Poor balance and lower gray matter volume predict falls in older adults with mild cognitive impairment

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• 作者：Hyuma Makizako (13) (8)
  Hiroyuki Shimada (13)
  Takehiko Doi (13) (8)
  Hyuntae Park (9)
  Daisuke Yoshida (13)
  Kazuki Uemura (13) (8)
  Kota Tsutsumimoto (13)
  Teresa Liu-Ambrose (10) (11) (12)
  Takao Suzuki (13)
  
• 刊名：BMC Neurology
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：13
• 期：1
• 全文大小：350KB
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  60. The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2377/13/102/prepub
  
• 作者单位：Hyuma Makizako (13) (8)
  Hiroyuki Shimada (13)
  Takehiko Doi (13) (8)
  Hyuntae Park (9)
  Daisuke Yoshida (13)
  Kazuki Uemura (13) (8)
  Kota Tsutsumimoto (13)
  Teresa Liu-Ambrose (10) (11) (12)
  Takao Suzuki (13)
  
  13. Research Institute, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan
  8. Japan Society for the Promotion of Science, Tokyo, Japan
  9. Section for Physical Functioning Activation, Department of Functioning Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan
  10. Aging, Mobility, and Cognitive Neuroscience Laboratory, Department of Physical Therapy, University of British Columbia, Vancouver, BC, Canada
  11. Brain Research Centre, University of British Columbia, Vancouver, BC, Canada
  12. Centre for Hip Health and Mobility, Vancouver Coastal Health Research Institute, University of British Columbia, Vancouver, BC, Canada
  

文摘

Background The risk of falling is associated with cognitive dysfunction. Older adults with mild cognitive impairment (MCI) exhibit an accelerated reduction of brain volume, and face an increased risk of falling. The current study examined the relationship between baseline physical performance, baseline gray matter volume and falls during a 12-month follow-up period among community-dwelling older adults with MCI. Methods Forty-two older adults with MCI (75.6?years, 43% women) underwent structural magnetic resonance imaging and baseline physical performance assessment, including knee-extension strength, one-legged standing time, and walking speed with normal pace. ‘Fallers-were defined as people who had one or more falls during the 12-month follow-up period. Results Of the 42 participants, 26.2% (n--1) experienced at least one fall during the 12-month follow-up period. Fallers exhibited slower walking speed and shorter one-legged standing time compared with non-fallers (both p-lt;-01). One-legged standing time (sec) (standardized odds ratio [95% confidence interval]: 0.89 [0.81, 0.98], p--02) was associated with a significantly lower rate of falls during the 12-month follow-up after adjusting for age, sex, body mass index, and history of falling in the past year at baseline. Voxel-based morphometry was used to examine differences in baseline gray matter volume between fallers and non-fallers, revealing that fallers exhibited a significantly greater reduction in the bilateral middle frontal gyrus and superior frontal gyrus. Conclusions Poor balance predicts falls over 12?months, and baseline lower gray matter densities in the middle frontal gyrus and superior frontal gyrus were associated with falls in older adults with MCI. Maintaining physical function, especially balance, and brain structural changes through many sorts of prevention strategies in the early stage of cognitive decline may contribute to decreasing the risk of falls in older adults with MCI.