PMID: 8459095Mar 1, 1993Paper

Reflex vasodilatation in the cat lip evoked by stimulation of vagal afferents

Journal of the Autonomic Nervous System
H Izumi, K Karita

Abstract

In 36 cats under nembutal anaesthesia, stimulation of the central end of the cut vagus nerve caused blood flow to increase in only the ipsilateral side in six cats (17%) and in the bilateral sides in 30 cats (83%) in the lower lips. Pretreatment with hexamethonium to block nicotinic synapses in autonomic ganglia resulted in a time-dependent reduction of the reflex vasodilator response, while phentolamine, propranolol (alpha-, beta-adrenoreceptor antagonists) and tripelennamine (histamine receptor antagonist) had no effect. Pretreatment with atropine (muscarinic receptor antagonist) showed a slight, but not statistically insignificant attenuation of the reflex vasodilatation. Ipsilateral section of either the glossopharyngeal nerve root or the inferior alveolar nerve completely abolished the reflex vasodilator response elicited by central vagal stimulation. The reflex vasodilator response induced by stimulation of the central end of the cut vagus nerve was abolished by topical capsaicin application on the central cut ends of the vagus nerve but not by capsaicin on the inferior alveolar nerve. These results suggest that there is a cutaneous reflex vasodilator system that can be activated via capsaicin-sensitive afferent fibres in...Continue Reading

References

Jan 1, 1992·The Japanese Journal of Physiology·H Izumi, K Karita
Jul 1, 1992·Journal of the Autonomic Nervous System·K Karita, H Izumi
Feb 1, 1992·Journal of the Autonomic Nervous System·H Izumi, K Karita
Jan 1, 1990·Microvascular Research·H IzumiD Sanjo
Jan 1, 1991·The Japanese Journal of Physiology·H Izumi, K Karita
Oct 1, 1989·The Journal of Physiology·J LundbergB G Wallin
Jan 1, 1987·The Journal of Physiology·H Blumberg, B G Wallin
Apr 30, 1984·Brain Research·W Maixner, A Randich
Jan 1, 1982·Annual Review of Pharmacology and Toxicology·H E Brezenoff, R Giuliano
Apr 1, 1981·Journal of the Autonomic Nervous System·M Kalia
Jan 1, 1963·Ergebnisse der Physiologie, biologischen Chemie und experimentellen Pharmakologie·A S PAINTAL

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Citations

Feb 6, 1995·European Journal of Pharmacology·H IzumiK Karita
Dec 1, 1993·Journal of the Autonomic Nervous System·K Karita, H Izumi
Jul 1, 1994·Journal of the Autonomic Nervous System·H Izumi, K Karita
Mar 1, 1995·General Pharmacology·H Izumi
Apr 6, 1999·Pharmacology & Therapeutics·H Izumi
Sep 24, 1999·Journal of the Autonomic Nervous System·H SasanoH Katsuya
Feb 8, 2014·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Hisayoshi IshiiHiroshi Izumi

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