PMID: 2864979Oct 28, 1985Paper

Chemical stimulation of the area postrema induces cardiorespiratory changes in the cat

Brain Research
P J GattiR A Gillis

Abstract

The purpose of our study was to determine the cardiorespiratory effects of exciting cell bodies of the area postrema of the cat. This was accomplished by local application of L-glutamic acid (bilateral application of 5 microliter of a 250-1000 mM solution) and kainic acid (bilateral application of 5 microliter of a 40 mM solution) to the area postrema of chloralose-anesthetized cats while monitoring arterial pressure, heart rate, tidal volume and respiratory rate. These excitatory amino acids activate neuronal cell bodies but not axons of passage. L-Glutamic acid produced a dose-dependent increase in arterial pressure, decreases in respiratory rate and minute volume and, occasionally, ventricular tachyarrhythmias. Kainic acid produced effects similar to those seen with L-glutamic acid except the changes in respiratory activity were more pronounced with each animal exhibiting respiratory arrest. In artificially respired animals, kainic acid produced similar cardiovascular changes as those occurring in spontaneously breathing animals (i.e. increases in arterial pressure of 61 +/- 5.7 mm Hg, and in heart rate of 32 +/- 8.3 beats/min). Finally, application of kainic acid to the area postrema abolished the pressor and tachycardic re...Continue Reading

References

Jan 1, 1984·Journal of Neurochemistry·F Fonnum
Sep 20, 1983·The Journal of Comparative Neurology·D van der Kooy, L Y Koda

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Citations

Jan 1, 1993·Brain Research Bulletin·A P KnoxD O Carpenter
Jul 21, 1999·Journal of the Autonomic Nervous System·D A RuggieroA L Sica
Jun 24, 2004·Journal of Neurophysiology·Ranjinidevi AmbalavanarChristy L Ludlow
Jun 6, 2014·Open Journal of Molecular and Integrative Physiology·Fraser HendersonStephen J Lewis
Sep 1, 1987·Journal of Neurosurgery·J RosenørnF Rønde
Sep 8, 1998·Journal of Applied Physiology·K D O'HalloranG E Bisgard
Feb 10, 1999·The American Journal of Physiology·M Hay, K A Lindsley

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