scholarly journals Linalool-rich Rosewood Oil Induces Vago-vagal Bradycardic and Depressor Reflex in Rats

2013 ◽  
Vol 28 (1) ◽  
pp. 42-48 ◽  
Author(s):  
Rodrigo José de Siqueira ◽  
Karilane Maria Silvino Rodrigues ◽  
Moisés Tolentino Bento da Silva ◽  
Carlos Antônio Barros Correia Junior ◽  
Gloria Pinto Duarte ◽  
...  
Keyword(s):  
Depressor Reflex

Inferior cardiac nerve activity in the cat during occlusion of the mesenteric artery

1979 ◽  
Vol 236 (2) ◽  
pp. H286-H290
Author(s):  
R. S. Tuttle ◽  
M. McCleary
Keyword(s):  
Mesenteric Artery ◽  
Carotid Sinus ◽  
Artery Occlusion ◽  
Nerve Activity ◽  
Cardiac Nerve ◽  
Pressor Reflex ◽  
Depressor Reflex ◽  
Sympathetic Discharge ◽  
Mesenteric Artery Occlusion ◽  
Inferior Cardiac Nerve

A number of studies in this and other laboratories using hemodynamic and pharmacologic evidence have suggested that occlusion of the mesenteric artery evokes a pressor reflex initiated by mesenteric baroreceptors. To provide additional evidence in support of this hypothesis, neurophysiological recordings were made of inferior cardiac nerve activity during mesenteric artery occlusion (MAO). The results indicate that MAO enhances inferior cardiac nerve activity in the cat, providing that the carotid sinus nerves have been cut. Cutting of the mesenteric nerves further facilitates cardiac nerve activity and abolishes the response to mesenteric artery occlusion. The evidence suggests that MAO evokes a reflex sympathetic discharge which is subject to override by the carotid sinus depressor reflex. The afferent limb of the reflex is characterized by a tonic depressor outflow from the mesenteric pressure receptors.

1-Nitro-2-phenylethane, the main constituent of the essential oil of Aniba canelilla, elicits a vago-vagal bradycardiac and depressor reflex in normotensive rats

2010 ◽  
Vol 638 (1-3) ◽  
pp. 90-98 ◽  
Author(s):  
Rodrigo José Bezerra de Siqueira ◽  
Francisco Igor Bulcão Macedo ◽  
Leylliane de Fátima Leal Interaminense ◽  
Gloria Pinto Duarte ◽  
Pedro Jorge Caldas Magalhães ◽  
...  
Keyword(s):  
Essential Oil ◽  
Main Constituent ◽  
Depressor Reflex

scholarly journals Modulation of cardiopulmonary depressor reflex in nucleus ambiguus by electroacupuncture: roles of opioids and γ-aminobutyric acid

2012 ◽  
Vol 302 (7) ◽  
pp. R833-R844 ◽  
Author(s):  
Stephanie C. Tjen-A-Looi ◽  
Peng Li ◽  
Min Li ◽  
John C. Longhurst
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Low Frequency ◽  
Vagal Afferents ◽  
Nucleus Ambiguus ◽  
Aminobutyric Acid ◽  
Vagal Activity ◽  
Induced Hypotension ◽  
Cardiopulmonary Receptors ◽  
Depressor Reflex

Stimulation of cardiopulmonary receptors with phenylbiguanide (PBG) elicits depressor cardiovascular reflex responses, including decreases in blood pressure and heart rate mediated in part by the brain stem parasympathetic cardiac neurons in the nucleus ambiguus (NAmb). The present study examined NAmb neurotransmitter mechanisms underlying the influence of electroacupuncture (EA) on the PBG-induced hypotension and bradycardia. We hypothesized that somatic stimulation during EA modulates PBG responses through opioid and γ-aminobutyric acid (GABA) modulation in the NAmb. Anesthetized and ventilated cats were studied during repeated stimulation with PBG or cardiac vagal afferents while low-frequency EA (2 Hz) was applied at P5–6 acupoints overlying the median nerve for 30 min and NAmb neuronal activity, heart rate, and blood pressure were recorded. Microinjection of kainic acid into the NAmb attenuated the PBG-induced bradycardia from −60 ± 11 to −36 ± 11 beats/min. Likewise, EA reduced the PBG-induced depressor and bradycardia reflex by 52 and 61%, respectively. Cardiac vagal afferent evoked preganglionic cellular activity in the NAmb was reduced by EA for about 60 min. Blockade of opioid or GABAA receptors using naloxone and gabazine reversed the EA-related modulation of the evoked cardiac vagal activity by 73 and 53%, respectively. Similarly, naloxone and gabazine reversed EA modulation of the negative chronotropic responses from −11 ± 5 to −23 ± 6 and −13 ± 4 to −24 ± 3 beats/min, respectively. Thus EA at P5–6 decreases PBG evoked hypotension and bradycardia as well as the NAmb PBG-sensitive preganglionic cardiac vagal outflow through opioid and GABA neurotransmitter systems.

scholarly journals Depressor Reflex from the Kidney with Altered Perfusion Pressure

1964 ◽  
Vol 5 (3) ◽  
pp. 254-259
Author(s):  
Hideo UEDA ◽  
Gosuke INOUE ◽  
Shigeru YAGI ◽  
Masao ISHII
Keyword(s):  
Perfusion Pressure ◽  
Depressor Reflex

scholarly journals Stimulation of pulmonary vagal C-fibers by trans-4-methyl-β-nitrostyrene induces bradycardiac and depressor reflex in rats: Role of vanilloid TRPV1 receptors

2019 ◽  
Vol 849 ◽  
pp. 154-159 ◽  
Author(s):  
Taylena Maria Teófilo ◽  
Glória Pinto Duarte ◽  
Rosivaldo Santos Borges ◽  
Armênio Aguiar Santos ◽  
Pedro Jorge Caldas Magalhães ◽  
...  
Keyword(s):  
C Fibers ◽  
Trpv1 Receptors ◽  
Depressor Reflex ◽  
Stimulation Of
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