Responsiveness of Human Infant Cerebral Arteries to Sympathetic Nerve Stimulation and Vasoactive Agents
نویسندگان
چکیده
منابع مشابه
Effect of sympathetic nerve stimulation on cerebral blood flow and on large cerebral arteries of dogs.
This study was performed to determine whether sympathetic stimulation reduces or redistributes cerebral blood flow. Total and regional cerebral blood flows were measured with the use of microspheres. Left stellate and superior cervical ganglia were stimulated electrically in anesthetized dogs. Sympathetic stimulation did not alter blood flow to ipsilateral cerebrum, cerebellum, or brainstem. Re...
متن کاملResponse of cerebral arteries to sympathetic stimulation during acute hypertension.
Our goal was to determine whether sympathetic stimulation during acute hypertension constricts large cerebral arteries and attenuates increases in cerebral microvascular pressure. We measured cerebral blood flow with microspheres and pressure in small pial arteries with a servonull device in anesthetized cats. During moderate hypertension, sympathetic stimulation had little effect on resistance...
متن کاملResponsiveness of isolated cerebral and peripheral arteries to serotonin, norepinephrine, and transmural electrical stimulation.
Spirally cut strips of cerebral and peripheral arteries from dogs were used for comparing the vasoconstricting effect of serotonin, norepinephrine, K + , and transmural electrical stimulation. Sensitivity of cerebral (basilar, posterior cerebral, and middle cerebral) arterial strips to serotonin was markedly greater than that to norepinephrine with respect to the median effective concentration ...
متن کاملDeterminants of response of pial arteries to norepinephrine and sympathetic nerve stimulation.
Feline pial arteries larger than 100 mu in diameter constricted in response to cervical sympathetic nerve stimulation suggests or in response to topical application of norepinephrine. Smaller pial arteries were unresponsive to norepinephrine. This unresponsiveness persisted when norepinephrine was dissolved in CSF with high calcium ion concentration, or in CSF with both high calcium ion and zer...
متن کاملPotentiation by anticholinesterases of the response of rat mesenteric arteries to sympathetic postganglionic nerve stimulation.
The anticholinesterase agents, physostigmine, neostigmine, and diisopropylfluorophosphonate were studied for their effect on the vasoconstrictor responses of perfused mesenteric arteries of rat produced by stimulation of their sympathetic postganglionic nerves. The experiments were performed at 30°C. All three anticholinesterase drugs greatly potentiated the vasoconstrictor response to nerve st...
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ژورنال
عنوان ژورنال: Pediatric Research
سال: 1998
ISSN: 0031-3998,1530-0447
DOI: 10.1203/00006450-199811000-00016