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	Provedor de dados BJMBR (4) Autor Machado,B.H. (4) Bonagamba,L.G.H. (2) Dias-dos-Santos,J.R. (1) Fazan Jr.,R. (1) Salgado,H.C. (1) Zhang,C. (1) Mais... Palavra-chave Cardiovascular regulation (2) Aortic coarctation (1) Aortic resistance (1) Arterial pressure oscillations (1) Autonomic regulation (1) Carotid chemoreceptors (1) Deep breaths (1) Doppler flowmetry (1) Hypertension (1) NK-1 receptors (1) Reflex bradycardia (1) Sinoaortic denervation (1) Substance P (1) Tachykinins (1) Trans-(±)-1-amino-1 3-cyclopentanedicarboxylic acid (1) Trans-(±)-ACPD L-glutamate ionotropic receptors excitatory amino acid receptors neurotransmission baroreflex chloralose anesthesia (1) Ventilation (1) Ventilatory patterns (1) Wakefulness-sleep cycle (1) Whole body plethysmography (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2000 (1) 1998 (1) 1997 (2) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Blockade of NK-1 receptors in the lateral commissural nucleus tractus solitarii of awake rats had no effect on the cardiovascular responses to chemoreflex activation BJMBR Zhang,C.; Bonagamba,L.G.H.; Machado,B.H.. The neurotransmission of the chemoreflex in the nucleus tractus solitarii (NTS), particularly of the sympatho-excitatory component, is not completely understood. There is evidence that substance P may play a role in the neurotransmission of the chemoreflex in the NTS. Microinjection of substance P (50 pmol/50 nl, N = 12, and 5 nmol/50 nl, N = 8) into the commissural NTS of unanesthetized rats produced a significant increase in mean arterial pressure (101 ± 1 vs 108 ± 2 and 107 ± 3 vs 115 ± 4 mmHg, respectively) and no significant changes in heart rate (328 ± 11 vs 347 ± 15 and 332 ± 7 vs 349 ± 13 bpm, respectively) 2 min after microinjection. Previous treatment with WIN, an NK-1 receptor antagonist (2.5 nmol/50 nl), microinjected into the NTS of a specific... Tipo: Info:eu-repo/semantics/article Palavras-chave: Tachykinins; Cardiovascular regulation; Carotid chemoreceptors; Autonomic regulation; NK-1 receptors; Substance P. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000001100018 Cardiovascular and respiratory changes during slow-wave sleep in rats are associated with electrocorticogram desynchronization BJMBR Dias-dos-Santos,J.R.; Machado,B.H.. In awake rats a single recurrent larger tidal volume (deep breaths) occurs at regular intervals, followed by oscillations in arterial pressure and heart rate. In the present study we recorded the changes in blood pressure, heart rate and ventilation during the wakefulness-sleep cycle identified by electrocorticographic records in order to determine whether the deep breaths and cardiovascular oscillations were associated with changes in the electrocorticogram. During several episodes of slow-wave sleep (SWS) in 7 rats the deep breaths and oscillations in arterial pressure and heart rate were preceded by SWS desynchronization. The interval between deep breaths during SWS was 71 ± 4 s, the period between initial desynchronization and the generation of deep... Tipo: Info:eu-repo/semantics/article Palavras-chave: Wakefulness-sleep cycle; Ventilation; Cardiovascular regulation; Deep breaths; Ventilatory patterns; Arterial pressure oscillations; Whole body plethysmography. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001100018 Cardiovascular responses to microinjection of trans-(±)-ACPD into the NTS were similar in conscious and chloralose-anesthetized rats BJMBR Machado,B.H.; Bonagamba,L.G.H.. The changes in mean arterial pressure (MAP) and heart rate (HR) in response to the activation of metabotropic receptors in the nucleus tractus solitarii (NTS) with trans-(±)-1-amino-1,3-cyclopentanedicarboxylic acid (trans-(±)-ACPD) were evaluated in conscious and anesthetized Wistar, male rats weighing 240-260 g (N = 8). The responses obtained with trans-(±)-ACPD were compared with the responses to L-glutamate (1 nmol/100 nl), since in a previous study we showed that anesthesia converted a pressor response to L-glutamate microinjected into the NTS of conscious rats to a depressor response in the same rats under urethane or chloralose anesthesia. Microinjection of 3 doses of trans-(±)-ACPD (100, 500 and 1000 pmol/100 nl) produced a dose-dependent fall in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Trans-(±)-ACPD L-glutamate ionotropic receptors excitatory amino acid receptors neurotransmission baroreflex chloralose anesthesia; Trans-(±)-1-amino-1 3-cyclopentanedicarboxylic acid. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000400016 Hemodynamic responses to acute aortic coarctation in conscious sinoaortic denervated rats BJMBR Fazan Jr.,R.; Machado,B.H.; Salgado,H.C.. The hemodynamic responses to acute (45 min) partial aortic constriction were studied in conscious intact (N = 7) or sinoaortic denervated (SAD) adult male Wistar rats (280-350 g, N = 7) implanted with carotid and femoral arterial catheters, a pneumatic cuff around the abdominal aorta and a pulsed Doppler flow probe to measure changes in aortic resistance. In addition, the hypertensive response and the reflex bradycardia elicited by total (N = 8) vs partial (N = 7) aortic constriction (monitored by maintenance of the pressure distal to the cuff at 50 mmHg) were compared in two other groups of intact rats. Intact rats presented a smaller hypertensive response (26 to 40% above basal level) to partial aortic constriction than SAD rats (38 to 58%). The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Hypertension; Aortic coarctation; Doppler flowmetry; Aortic resistance; Reflex bradycardia; Sinoaortic denervation. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001000018 Registros recuperados: 4 Primeira ... 1 ... Última

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