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- W2014374627 abstract "Spinal cord injury (SCI) has serious long-term consequences on sympathetic cardiovascular regulation. Orthostatic intolerance results from insufficient baroreflex regulation (BR) of sympathetic outflow to maintain proper blood pressure upon postural changes. Autonomic dysreflexia occurs due to insufficient inhibition of spinal sources of sympathetic activity. Both of these conditions result from the inability to control sympathetic activity caudal to SCI. It is well established that limited motor ability recovers after incomplete SCI. Therefore, the goal of this study was to determine whether recovery of BR occurs after chronic, left thoracic spinal cord hemisection at either T 3 or T 8 . Baroreflex tests were performed in rats by measuring the reflex response of left (ipsilateral) renal sympathetic nerve activity to decreases and increases in arterial pressure produced by ramped infusions of sodium nitroprusside and phenylephrine, respectively. One week after a T 3 left hemisection, BR function was modestly impaired. However, 8 wk after a T 3 left hemisection, BR function was normal. One week after a T 8 left hemisection, BR function was significantly impaired, and 8 wk after a T 8 left hemisection, BR function was significantly improved. These results indicate that BR of renal sympathetic nerve activity in rats may partially recover after spinal cord hemisections, becoming normal by 8 wk after a T 3 lesion, but not after a T 8 lesion. The nature of the spinal cord and/or brain stem reorganization that mediates this recovery remains to be determined." @default.
- W2014374627 created "2016-06-24" @default.
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- W2014374627 date "2011-11-01" @default.
- W2014374627 modified "2023-10-15" @default.
- W2014374627 title "Recovery of baroreflex control of renal sympathetic nerve activity after spinal lesions in the rat" @default.
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- W2014374627 doi "https://doi.org/10.1152/ajpregu.00295.2011" @default.
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