منابع مشابه
Localized neurogenic vasoconstriction of the basilar artery.
Localized Neurogenic Vasoconstriction of the Basilar Artery • Ring segments from the caudal end of the basilar artery of the rabbit contract to electrical stimulation of their intramural nerve supply more than those from adjacent parts of the vertebral and the rostral three-fourths of the basilar arteries. The magnitude of developed neurogenic tension is approximately one-fourth that of the ear...
متن کاملEpinephrine facilitates neurogenic vasoconstriction in humans.
Numerous studies have suggested that epinephrine may facilitate neural release of NE. There have been no studies in humans that demonstrate the functional significance of this action. To determine whether epinephrine facilitates neurogenic vasoconstriction in humans, we contrasted forearm vasoconstrictor responses to a reflex stimulus (lower body negative pressure [LBNP]) and to intraarterial N...
متن کاملNeurogenic sympathetic vasoconstriction of the rabbit basilar artery.
When examined by fluorescence microscopy the rabbit basilar artery contains a rich adrenergic-like plexus at the adventitiomedial junction. The fluorescence disappears upon chronic reserpinization and bilateral superior cervical ganglionectomy. Transmural stimulation of intramural nerves a results in a response which is predominantly constrictor but also contains a small, inconstant dilator com...
متن کاملDistribution theory of resistance of neurogenic vasoconstriction to alpha-receptor blockade in the rabbit.
The effects of a-receptor-blocking agents on the contractile responses of isolated rabbit arteries to sympathetic nerve stimulation and exogenous lnorepinephrine (Z-NE) were compared. In the pulmonary artery and aorta, yohimbine, phentolamine, and phenoxybenzamine blocked the response to nerve stimulation less than that to an equipotent dose of Z-NE. This resistance of neurogenic response was i...
متن کاملNeurogenic vasoconstriction as affected by cholinergic and nitroxidergic nerves in dog ciliary and ophthalmic arteries.
PURPOSE To determine the involvement of noradrenergic and other vasoconstrictor nerves in the contraction of ocular arteries and the modification by cholinergic and nitroxidergic nerves of vasoconstrictor nerve function. METHODS Changes in isometric tension were recorded in helical strips of the canine posterior ciliary and external ophthalmic arteries denuded of the endothelium, which were s...
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ژورنال
عنوان ژورنال: Biomedical Journal of Scientific and Technical Research
سال: 2023
ISSN: ['2574-1241']
DOI: https://doi.org/10.26717/bjstr.2023.48.007637