Parasympathetic Stimulation Elicits Cerebral Vasodilatation in Rat

Overview

Journal Auton Neurosci

Publisher Elsevier

Specialty Neurology

Date 2007 Feb 6

PMID 17275420

Citations 14

Authors

William T Talman

Julie Corr

Deidre Nitschke Dragon

Deqiang Wang

Affiliations

Soon will be listed here.

Abstract

Forebrain arteries receive nitroxidergic input from parasympathetic ganglionic fibers that arise from the pterygopalatine ganglia. Previous studies have shown that ganglionic stimulation in some species led to cerebral vasodilatation while interruption of those fibers interfered with vasodilatation seen during acute hypertension. Because the ganglionic fibers are quite delicate and are easily damaged when the ganglia are approached with published techniques we sought to develop a method that allowed clear exposure of the ganglia and permitted demonstration of cerebral vasodilatation with electrical stimulation of the ganglia in the rat. We had found that an orbital approach during which the eye was retracted for visualization of the ganglion precluded eliciting vasodilatation with ganglionic stimulation. In the current study approaching the ganglion through an incision over the zygomatic arch provided clear exposure of the ganglion and stimulation of the ganglion with that approach led to vasodilatation.

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