Article

Temporal Order Memory Assessed during Spatiotemporal Navigation As a Behavioral Cognitive Marker for Differential Alzheimer's Disease Diagnosis

Pierre et Marie Curie Paris 6 University, Navigation, Memory and Aging Team, Equipe Navigation Memoire et Vieillissement team, UMR7102, CNRS, F75005 Paris, France.
The Journal of Neuroscience : The Official Journal of the Society for Neuroscience (Impact Factor: 6.75). 02/2012; 32(6):1942-52. DOI: 10.1523/JNEUROSCI.4556-11.2012
Source: PubMed

ABSTRACT Episodic memory impairment is a hallmark for early diagnosis of Alzheimer's disease. Most actual tests used to diagnose Alzheimer's disease do not assess the spatiotemporal properties of episodic memory and lead to false-positive or -negative diagnosis. We used a newly developed, nonverbal navigation test for Human, based on the objective experimental testing of a spatiotemporal experience, to differentially Alzheimer's disease at the mild stage (N = 16 patients) from frontotemporal lobar degeneration (N = 11 patients) and normal aging (N = 24 subjects). Comparing navigation parameters and standard neuropsychological tests, temporal order memory appeared to have the highest predictive power for mild Alzheimer's disease diagnosis versus frontotemporal lobar degeneration and normal aging. This test was also nonredundant with classical neuropsychological tests. As a conclusion, our results suggest that temporal order memory tested in a spatial navigation task may provide a selective behavioral marker of Alzheimer's disease.

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    • "Our results may have further clinical implications in light of a 2012 report that impaired temporal order memory may be a selective behavioral marker of Alzheimer disease (Bellassen et al, 2012). In coming years, these combined findings could have particular meaning for the growing number of people with HIV infection who are living into their 60s and beyond (High et al, 2012). "
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    • "More importantly with the Pirogovsky et al. (2009) report, impaired performance for temporal ordering was correlated with time to symptom onset in individuals with the mutation underlying Huntington's Disease--suggesting temporal ordering may be an endophenotype or prodromal feature that can be used to characterize the disease. In fact, temporal processing deficits have been reported in Alzheimer's Disease (Bellassen, et al., 2012), Parkinson's Disease (Sagar, et al., 1988), Huntington's Disease (Pirogovsky, et al., 2009), fragile X-associated disorders (Hunsaker, 2012; Johnson-Glenberg, 2008; Simon, 2011), schizophrenia (Davalos, et al., 2003a,b), and autism spectrum disorders (Allman, et al., 2011). "
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    • "Behavioral interventions that minimize temporal interference and structure daily living tasks into repetitive, fixed sequences may improve memory and perhaps could increase functional independence in older adults. In addition, a recent study reports that impaired temporal order memory may be a selective behavioral marker of Alzheimer's disease (Bellassen et al. 2012). Therefore, "
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