Resting-state fMRI was used to investigate the aging effect on caudate function in mild cognitively impaired participants, with the focus of sex-dependent effect. Graph theory analysis was conducted to derive caudate nodal strength, which was then input to linear mixed effect model to evaluate its association with age. A striking aging effect was observed only in women with MCI but not in men with MCI, which was closely related to cognitive decline in woman participants. This finding suggests that caudate may be critical for alleviating cognitive decline in women with MCI.
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