Hippocampal Atrophy Varies by Neuropsychologically Defined MCI Among Men in Their 50s  

Oleh:

Jak, Amy J. ; Panizzon, Matthew S. ; Spoon, Kelly M. ; Fennema-Notestine, Christine ; Franz, Carol E.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Geriatric Psychiatry (keterangan: ada di ClinicalKey) vol. 23 no. 05 (May 2015), page 456–465 .
Topik: MCI; neuropsychology; MRI

Ketersediaan

Perpustakaan FK Nomor Panggil: A35.K Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Objective In an effort to address earliest detection of mild cognitive impairment (MCI), we examined hippocampal volumes and atrophy in middle-aged men to explore neuroanatomical support for different neuropsychological definitions of MCI. Methods 460 men aged 51–60 years underwent neuropsychological testing and MRI. MCI was defined according to five criteria sets. MRI-derived hippocampal volume and hippocampal occupancy (HOC) were obtained via FreeSurfer. Statistical analyses were performed using linear mixed models. Results Differences in HOC between normal cognitive functioning, amnestic, and non-amnestic MCI were observed using MCI criteria that required one impaired (>1.5 SD) cognitive measure in a given cognitive domain or a cognitive composite score method with a cut-point 2 SD below the mean. Differences in standard hippocampal volume were only found between normal and amnestic presentations and only when using the composite score method. Conclusion Results provide empirical support for detection of pre-MCI in younger cohorts. Convergence of neuropsychological and neuroanatomical data, particularly HOC (as opposed to standard cross-sectional volume), supports early identification of MCI as defined by some neuropsychological criteria.

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