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  • Title: Inhibition of renal sympathetic nerve activity by electrical stimulation of the hypothalamic paraventricular nucleus in anesthetized rats.
    Author: Kannan H, Niijima A, Yamashita H.
    Journal: J Auton Nerv Syst; 1987 Nov; 21(1):83-6. PubMed ID: 3440820.
    Abstract:
    In an attempt to obtain direct evidence for involvement of sympathetic outflow in paraventricular nucleus (PVN)-induced depressor response, effects of electrical stimulation of the PVN on renal sympathetic nerve activity were examined in urethane-chloralose anesthetized rats. Low intensity stimulation of the PVN inhibited renal sympathetic nerve activity, whereas the high intensity stimulation evoked an excitation followed by long-lasting inhibition in renal sympathetic nerve activity. Latencies of the inhibitory and the excitatory responses were about 200 ms and 50-100 ms, respectively. The result suggests that a decrease in blood pressure induced by low intensity stimulation of the PVN is due to inhibiting the sympathetic outflow.
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