Are impairments in visual-spatial attention a critical factor for increased falls risk in seniors? An event-related potential study

NEUROPSYCHOLOGIA

卷:47

Article

Nagamatsu, Lindsay S.¹  Liu-Ambrose, Teresa Y. L.^2,3  Carolan, Patrick¹  Handy, Todd C.¹ 

[1] Univ British Columbia, Dept Psychol, Vancouver, BC V6T 1Z4, Canada

[2] Univ British Columbia, Dept Phys Therapy, Vancouver, BC V6T 1Z4, Canada

[3] Vancouver Coastal Res Inst, Ctr Hip Hlth & Mobil, Vancouver, BC, Canada

关键词: Falls;    Cognitive impairment;    Visual-spatial attention;    Aging;   

DOI  :  10.1016/j.neuropsychologia.2009.05.022

来源: Elsevier

【 摘 要 】

Falls are experienced annually by approximately one third of community dwellers over the age of 65, and while neuro-cognitive deficits have been shown to increase falls risk, the specific nature of these deficits remain unspecified. Here we examined whether visual-spatial attention may be a core neuro-cognitive system showing abnormal function in falters. Using a between-groups design, we recorded event-related potentials in a canonical spatial cuing task performed by two groups of senior (aged 65+ years old) participants: those with a recent history of falls and those with no such history. In terms of attentional control systems in cortex, we found no significant differences in function between groups. However, in terms of attentional facilitation of cortical processing. we found that falters manifest specific abnormalities in the sensory/perceptual processing of targets in the left visual field. Our findings thus suggest that falters have specific deficits in visuocortical systems associated with attentional enhancement of events on the left side of visual space. (C) 2009 Elsevier Ltd. All rights reserved.

【 授权许可】

Free