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Abstract
The effects of renal ischemia and backflow of non-diuretic urine into the renal pelvis
on renal efferent sympathetic postganglionic nerve activity, femoral arterial pressure
and heart rate were studied to verify whether stimulation of renal chemoreceptors
elicits autonomic reflexes. In rats with intact spinal cord or spinal cord sectioned
at the T6 level a brief activation of renal chemoreceptors produced excitatory ipsilateral
and contralateral renorenal reflexes, whereas it only slightly and insignificantly
altered arterial pressure and heart rate. These results indicate that stimulation
of renal chemoreceptors elicits renorenal excitatory reflexes which might be integrated
both at spinal and supraspinal levels.