Regional fMRI brain activation does correlate with global brain volume

被引：18

作者：

Brodtmann, Amy ^{[1
]}

Puce, Aina ^{[1
,2
]}

Darby, David ^{[1
]}

Donnan, Geoffrey ^{[1
]}

机构：

[1] Univ Melbourne, Natl Stroke Res Inst, Melbourne, Vic, Australia

[2] Indiana Univ, Dept Psychol & Brain Sci, Res Imaging Facil, Bloomington, IN 47405 USA

来源：

BRAIN RESEARCH | 2009年 / 1259卷

基金：

英国医学研究理事会;

关键词：

Functional magnetic resonance imaging; Aging; Atrophy; Volumetry; Striate cortex; AGE-RELATED DIFFERENCES; POSITRON-EMISSION-TOMOGRAPHY; MILD COGNITIVE IMPAIRMENT; VOXEL-BASED MORPHOMETRY; ADULT LIFE-SPAN; ALZHEIMERS-DISEASE; HEMODYNAMIC-RESPONSE; CEREBRAL-CORTEX; NEURAL ACTIVITY; ELDERLY ADULTS;

D O I：

10.1016/j.brainres.2008.12.044

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

In healthy elderly participants, there has been little correlation found between measures of global brain atrophy and functional magnetic resonance imaging activated voxel counts and mean percent magnetic resonance signal change. We used a validated passive viewing task to calculate the fMRI activated voxel counts and mean percent MR signal change from the striate and ventral extrastriate cortices of 24 healthy control subjects (age range=33-89, mean age=66). We correlated these data with three measures of atrophy - percent brain volume, normalised brain volume and grey matter volume - to evaluate the relationship between global brain atrophy and regional fMRI activation. There was a strong positive correlation (r>0.90) between regional activation volume in striate and ventral extrastriate cortex and decreasing total brain volume when results were averaged by decade. Correlation with percent brain volume was particularly strong. In addition, we found a strong negative correlation between mean percent MR signal change and brain volume measures. Within-subject individual correlation was less strong, highlighting the problem of individual variability in brain volume and regional activation measures. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：17 / 25

页数：9

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