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Neurovascular coupling is impaired in cerebral microangiopathy--An event-related Stroop study.

Abstract：

:Small-vessel disease or cerebral microangiopathy is a common finding in elderly people leading finally to subcortical ischemic vascular dementia. Because cerebral microangiopathy impairs vascular reactivity and affects mainly the frontal lobes, we hypothesized that brain activation decreases during an event-related color-word matching Stroop task. 12 patients suffering from cerebral microangiopathy were compared with 12 age-matched controls. As an imaging method we applied functional near-infrared spectroscopy, because it is particularly sensitive to the microvasculature. The Stroop task led to activations in the lateral prefrontal cortex. Generally, the amplitude of the hemodynamic response was reduced in patients in tight correlation with behavioral slowing during the Stroop task and with neuropsychological deficits, namely attentional and executive dysfunction. Interestingly, patients showed an early deoxygenation of blood right after stimulation onset, and a delay of the hemodynamic response. Whereas the amplitude of the hemodynamic response is reduced in the frontal lobes also with normal aging, data suggest that impairments of neurovascular coupling are specific for cerebral microangiopathy. In summary, our findings indicate frontal dysfunction and impairments of neurovascular coupling in cerebral microangiopathy.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Schroeter ML,Cutini S,Wahl MM,Scheid R,Yves von Cramon D

doi

10.1016/j.neuroimage.2006.09.001

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

26-34

issue

1

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(06)00927-X

journal_volume

34

pub_type

杂志文章

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