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Titolo:
Pressor response to unilateral carotid chemoreceptor activation is not affected by ipsilateral antagonism of excitatory amino acid receptors in the rostral ventrolateral medulla of awake rats
Autore:
Mauad, H; Machado, BH;
Indirizzi:
Univ Sao Paulo, Dept Physiol, Sch Med Ribeirao Preto, BR-14049900 RibeiraoPreto, SP, Brazil Univ Sao Paulo Ribeirao Preto SP Brazil BR-14049900 BCaoPreto, SP, Brazil Fed Univ Espirito Santo, Dept Physiol Sci, Ctr Biomed, BR-29040090 Vitoria, ES, Brazil Fed Univ Espirito Santo Vitoria ES Brazil BR-29040090 BCtoria, ES, Brazil
Titolo Testata:
AUTONOMIC NEUROSCIENCE-BASIC & CLINICAL
fascicolo: 1-2, volume: 91, anno: 2001,
pagine: 26 - 31
SICI:
1566-0702(20010813)91:1-2<26:PRTUCC>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEUS-TRACTUS-SOLITARII; L-GLUTAMATE; CARDIOVASCULAR-RESPONSES; CONSCIOUS RATS; PARAVENTRICULAR NUCLEUS; PARABRACHIAL NUCLEUS; PROJECTIONS; STIMULATION; CHEMOREFLEX; NEURONS;
Keywords:
EAA receptors; chemoreflex; cardiovascular regulation; sympatho-excitation; nucleus tractus solitarii; rostral ventrolateral medulla;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Machado, BH Univ Sao Paulo, Dept Physiol, Sch Med Ribeirao Preto, BR-14049900 RibeiraoPreto, SP, Brazil Univ Sao Paulo Ribeirao Preto SP Brazil BR-14049900 BC Brazil
Citazione:
H. Mauad e B.H. Machado, "Pressor response to unilateral carotid chemoreceptor activation is not affected by ipsilateral antagonism of excitatory amino acid receptors in the rostral ventrolateral medulla of awake rats", AUTON NEURO, 91(1-2), 2001, pp. 26-31

Abstract

The importance of the integrity of the ipsilateral rostral ventrolateral medulla (RVLM) in the pressor response to activation of unilateral arterial chemoreceptors was evaluated. To achieve this goal, the left carotid body artery was ligated prior to the experiment and a guide cannula was implantedin the direction of the right RLVM, i.e. the side where the carotid body artery was kept intact. On the day of the experiment, the chemoreflex was activated with potassium cyanide (KCN, i.v.) before and after unilateral microinjection of kynurenic acid into the rostral or caudal aspect of the RVLM. The data indicated that microinjection of kynurenic into the rostral or caudal aspect of the RVLM produced no effect on the pressor response of chemoreflex activation. These data suggest that chemoreflex activation excites aneuronal network in which the processing of the sympatho-excitatory component of the chemoreflex is not restricted to an excitatory projection from the nucleus tractus solitarii to the ipsilateral RVLM. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 30/03/20 alle ore 00:50:52