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  • Title: Do subgroups of patients with Alzheimer's disease exhibit asymmetric deficits on memory tests?
    Author: Demadura T, Delis DC, Jacobson M, Salmon D.
    Journal: J Clin Exp Neuropsychol; 2001 Apr; 23(2):164-71. PubMed ID: 11309670.
    Abstract:
    Several studies have reported asymmetric cognitive profiles in patients with Alzheimer's disease (AD), but these results have almost exclusively been found using non-memory cognitive instruments. The present study investigated whether AD patients who display lateralized profiles on non-memory cognitive instruments also exhibit asymmetric deficits on verbal versus spatial memory tests. Sixty-eight AD patients participated in the study: 36 with a "High Verbal" cognitive profile, and 32 with a "High Spatial" profile. The results indicated that the High Verbal AD patients performed significantly better than the High Spatial AD patients on verbal memory tests, but the two subgroups failed to differ on spatial memory tests. Implications of these findings for understanding the heterogeneous nature of cognitive profiles in AD patients are discussed.
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