Early Alzheimer's disease-like reductions in gray matter and cognitive function with aging in nonhuman primates.

WM volumes tended to be negatively associated with follow‐up DR Task performance; however, these relationships did not reach statistical significance (number of correct trials at 20 seconds: β = –0.002, SE = 0.001, t = –2.047, P = .053; longest delay achieved: β = –0.006, SE = 0.003, t = –1.689, P = .106).

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