Spatial Navigation in Preclinical Alzheimer's Disease

Samantha L. Allison, Anne M. Fagan, John C. Morris, Denise Head

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

Although several previous studies have demonstrated navigational deficits in early-stage symptomatic Alzheimer's disease (AD), navigational abilities in preclinical AD have not been examined. The present investigation examined the effects of preclinical AD and early-stage symptomatic AD on spatial navigation performance. Performance on tasks of wayfinding and route learning in a virtual reality environment were examined. Comparisons were made across the following three groups: Clinically normal without preclinical AD (n = 42), clinically normal with preclinical AD (n = 13), and early-stage symptomatic AD (n = 16) groups. Preclinical AD was defined based on cerebrospinal fluid Aβ42 levels below 500 pg/ml. Preclinical AD was associated with deficits in the use of a wayfinding strategy, but not a route learning strategy. Moreover, post-hoc analyses indicated that wayfinding performance had moderate sensitivity and specificity. Results also confirmed early-stage symptomatic AD-related deficits in the use of both wayfinding and route learning strategies. The results of this study suggest that aspects of spatial navigation may be particularly sensitive at detecting the earliest cognitive deficits of AD.

Original languageEnglish
Pages (from-to)77-90
Number of pages14
JournalJournal of Alzheimer's Disease
Volume52
Issue number1
DOIs
StatePublished - Apr 26 2016

Keywords

  • Aging
  • allocentric
  • amyloid
  • caudate nucleus
  • egocentric
  • hippocampus

Fingerprint Dive into the research topics of 'Spatial Navigation in Preclinical Alzheimer's Disease'. Together they form a unique fingerprint.

  • Cite this