Results 101 to 110 of about 13,296 (264)

Carotid chemoreceptor discharge during epinephrine infusion in anesthetized cats

, 1992
It is known that during exercise there is an increase in plasma epinephrine. The purpose of the present investigation was to determine whether stimulation of carotid chemoreceptors by epinephrine is a direct effect or secondary to epinephrine-induced ...
C. B. Wolff, R. A. Linton, D. M. Band
core   +1 more source

Modulation of cerebral blood flow and cognition by hyperthermia and hypoxia: An electroencephalographic event‐related potentials perspective

Experimental Physiology, EarlyView.
Abstract Cerebral blood flow (CBF) is essential for sustaining neuronal metabolism and cognitive performance; however, the precise relationship between perfusion and cognition remains unclear. Although ageing and disease are associated with progressive declines in CBF and cognitive impairment, the acute effects of altered CBF under environmental ...
Hiroki Nakata, Shigehiko Ogoh, Manabu Shibasaki   +2 more
wiley   +1 more source

Peripheral chemoreceptor inputs to the parabrachial nucleus of the rat

, 1995
In the urethan-anesthetized rat, extracellular recordings were made from 60 neurons within the region of the parabrachial nucleus (PBN). The activity of 37 of 44 neurons was altered by selective stimulation of peripheral chemoreceptors via intracarotid ...
R. B. Felder, L. F. Hayward
core   +1 more source

Time‐course analysis of cerebral circulation and cardiorespiratory responses to acute central blood volume reduction in healthy young males

Experimental Physiology, EarlyView.
Abstract Central blood volume (CBV) reduction challenges circulatory and respiratory homeostasis, particularly during the initial compensatory phase (0–2 min), when rapid physiological adaptations occur. In this study, we examined dynamic cardiorespiratory responses to CBV reduction using lower‐body negative pressure (LBNP) in 11 healthy young males ...
Marina Feeley, Tomoki Watada, Go Ito, Ai Shimada, Toru Sawai, Hideomi Nakata, Shingo Otsuki, Tadayoshi Miyamoto   +7 more
wiley   +1 more source

Carotid and aortic chemoreceptor function in the rat

, 1977
Carotid and aortic chemoreceptor function was studied in normal Wistar rats. Sodium cyanide, lobeline HCl, and doxapram HCl in the doses of 2–400 mug/kg injected into the external carotid artery stimulated respiration significantly.
H. N. Sapru, A. J. Krieger
core   +1 more source

Sympathetic regulation of the cerebral circulation by the carotid chemoreceptor reflex

, 1980
The effects of carotid chemoreceptor reflex stimulation (intracarotid injection of nicotine 0.2 microgram/kg) were examined in conscious dogs on the cerebral circulation, using the radioactive microsphere technique to measure cerebral blood flow.
J. D. Rutherford, S. F. Vatner, L. L. Priano, W. T. Manders   +3 more
core   +1 more source

HilD-regulated chemotaxis proteins contribute to Salmonella Typhimurium colonization in the gut

mBio
In the enteric pathogen Salmonella Typhimurium, invasion and motility are coordinated by HilD, a master regulator that activates expression of genes encoding the type III secretion system 1 and some motility genes, including the chemotaxis gene mcpC ...
Kendal G. Cooper, Laszlo Kari, Audrey Chong, Naman Tandon, Kathleen Doran, Lidiane Gomes Da Silva, Diane C. Cockrell, Arden Baylink, Olivia Steele-Mortimer   +8 more
doaj   +1 more source

Chemoreceptor stimulation on sympathetic activity: dependence on respiratory phase

, 1989
Experiments were performed on chloralose-anesthetized, vagotomized, paralyzed, and artificially ventilated cats breathing 100% O2. Peripheral chemoreceptors were stimulated by rapid injections of CO2-saturated NaHCO3 in different phases of the ...
P. G. Katona, J. Czachurski, H. Seller, K. Dembowsky   +3 more
core   +1 more source

Interindividual variability in static apnoea performance is partly explained by genetic factors

Experimental Physiology, EarlyView.
Abstract A large interindividual variability exists in maximal apnoea duration and the physiological adjustments that occur during apnoea. Although a few genes have been found to be associated with some of the cardiovascular responses during apnoea, the extent to which genetic and environmental factors contribute to individual differences in apnoea ...
Anastasios Makris, Alexandros Sotiridis, Nickos Geladas, Kalliopi Gkouskou, Vassilis Klissouras, Maria D. Koskolou   +5 more
wiley   +1 more source

Pulmonary arterial mechanoreceptors mediate sustained sympathoexcitation during high altitude hypoxia in humans

Experimental Physiology, EarlyView.
Abstract Sympathetic nervous system activation is a hallmark of high‐altitude hypoxia, yet the afferent mechanisms remain incompletely defined. We examined the relative contributions of pulmonary arterial mechanoreceptors and carotid chemoreceptors – two excitatory pathways co‐activated by hypoxia – to sustained sympathoexcitation at altitude.
Michiel T. Ewalts, Lydia L. Simpson, Jack S. Talbot, Elliott J. Jenkins, Travis D. Gibbons, Connor A. Howe, Lauren E. Maier, Emily R. Vanden Berg, Alex M. Williams, Philip N. Ainslie, Samuel J. Oliver, Craig D. Steinback, Mike Stembridge, Jonathan P. Moore   +13 more
wiley   +1 more source