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• W2093584282 abstract "We sought to establish the temporal association of fluctuations in cortical cerebral blood flow (CBF) with ultrastructural alterations of microvessels in rat sensorimotor cortex (smCx) following administration of a rodent acceleration impact model of traumatic brain injury (TBI).Laser Doppler flowmetry (LDF) and electron microscopy (EM) were used in parallel experiments that lasted for up to 48 hours after induction of TBI.Compared to sham-operated control, there was a 37% reduction of cortical CBF between 12 and 24 hours, this reduction remaining unchanged for up to 48 hours post-TBI. Ultrastructural alterations in the lumen and wall of smCx microvessels, including endothelial cell distortion and luminal collapse, were seen at hour 1 and continued up to 48 hours after trauma. Compared to control, there was a 40% decrease in the average microvascular luminal area 4 hours and a trend to recover (21%) by 48 hours after trauma. Smooth muscle (SM) in the wall of reacting microvessels showed evidence of increase contractility that coincided temporally with the decreased perfusion of cortical CBF.Based on these observations, it is proposed that TBI causes alterations in the vascular tone of reacting microvessels which leads to prolonged vasoreactivity and restriction of the lumen in many but not all microvessels." @default.
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• W2093584282 date "2007-06-01" @default.
• W2093584282 modified "2023-10-14" @default.
• W2093584282 title "Alterations in cerebral cortex microvessels and the microcirculation in a rat model of traumatic brain injury: a correlative EM and laser Doppler flowmetry study" @default.
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• W2093584282 doi "https://doi.org/10.1179/016164107x204648" @default.
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