期刊
AMERICAN JOURNAL OF PSYCHIATRY
卷 159, 期 12, 页码 2096-2098出版社
AMER PSYCHIATRIC PRESS, INC
DOI: 10.1176/appi.ajp.159.12.2096
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Objective: The authors sought to determine whether caudate nucleus volumes or specific genotypes predict psychomotor slowing in older persons with depression. Method: Forty-seven persons with depression (mean age=51.8 years, SD=12.4) and 20 healthy volunteers (mean age=56.1 years, SD=9.8) underwent clinical assessments, a neuropsychological test of psychomotor speed (part A of the Trail Making Test), high-resolution magnetic resonance imaging scans, and genotyping for the apolipoprotein E epsilon4 allele and a mutation of the methylenetetrahydrofolate reductase enzyme. Results: Multivariate analyses revealed that psychomotor speed was uniquely predicted by age, a diagnosis of depression, right caudate nucleus volume, and mutation of the methylenetetrahydrofolate reductase enzyme. Conclusions: Psychomotor slowing, a key clinical and cognitive phenomenon in older persons with depression, is predicted by reduced caudate nucleus volumes and genetic determinants of homocysteine metabolism.
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