Article thumbnail

Cortical Function, Postural Control, and Gait Egocentric and Exocentric Navigation Skills in Older Adults

By Amy E. S, Roee Holtzer, Richard B. Lipton, Charles Hall and Joe Verghese

Abstract

Background. Human spatial navigation can be conceptualized as egocentric or exocentric, depending on the navigator’s perspective. Navigational impairment is known to occur in individuals with cognitive impairment, but less is known about navigational abilities in nondemented older adults. Our objective was to develop tests of navigation and study their cognitive correlates in nondemented older adults. Methods. We developed a Local Route Recall Test (LRRT) to examine egocentric navigation and a Floor Maze Test (FMT) to assess exocentric navigation in 127 older adults without dementia or amnestic Mild Cognitive Impairment (MCI). Factor analysis was used to reduce neuropsychological test scores to three cognitive factors representing Executive Function/Attention, Verbal Ability, and Memory. We examined relationships between navigational tests and cognitive function (using both cognitive factors and the highest loading individual test on each factor) in a series of regression analyses adjusted for demographic variables (age, sex, and education), medical illnesses, and gait velocity. Results. The tests were well tolerated, easy to administer, and reliable in this nondemented and non-MCI sample. Egocentric skills on the LRRT were associated with Executive Function/Attention (B0.650; 95 % confidence interval [CI],0.535 to0.139) and Memory (B0.518; 95 % CI,4.893 to0.063) factors. Exocentric navigation on the FMT was related to Executive Function/Attention (B8.542; 95 % CI,13.357 to3.727). Conclusions. Our tests appear to assess egocentric and exocentric navigation skills in cognitively normal older adults

Year: 2015
OAI identifier: oai:CiteSeerX.psu:10.1.1.544.2579
Provided by: CiteSeerX
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://biomedgerontology.oxfor... (external link)
  • http://biomedgerontology.oxfor... (external link)
  • http://citeseerx.ist.psu.edu/v... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.