<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Mellander, S</style></author><author><style face="normal" font="default" size="100%">Andersson, P O</style></author><author><style face="normal" font="default" size="100%">Afzelius, L E</style></author><author><style face="normal" font="default" size="100%">Hellstrand, P</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Neural beta-adrenergic dilatation of the facial vein in man. Possible mechanism in emotional blushing.</style></title><secondary-title><style face="normal" font="default" size="100%">Acta Physiol Scand</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Acta Physiol. Scand.</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Adult</style></keyword><keyword><style  face="normal" font="default" size="100%">Aged</style></keyword><keyword><style  face="normal" font="default" size="100%">Blushing</style></keyword><keyword><style  face="normal" font="default" size="100%">Electric Stimulation</style></keyword><keyword><style  face="normal" font="default" size="100%">Face</style></keyword><keyword><style  face="normal" font="default" size="100%">Female</style></keyword><keyword><style  face="normal" font="default" size="100%">Humans</style></keyword><keyword><style  face="normal" font="default" size="100%">Isoproterenol</style></keyword><keyword><style  face="normal" font="default" size="100%">Male</style></keyword><keyword><style  face="normal" font="default" size="100%">Middle Aged</style></keyword><keyword><style  face="normal" font="default" size="100%">Norepinephrine</style></keyword><keyword><style  face="normal" font="default" size="100%">Physical Stimulation</style></keyword><keyword><style  face="normal" font="default" size="100%">Receptors, Adrenergic</style></keyword><keyword><style  face="normal" font="default" size="100%">Receptors, Adrenergic, beta</style></keyword><keyword><style  face="normal" font="default" size="100%">Vasodilation</style></keyword><keyword><style  face="normal" font="default" size="100%">Veins</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1982</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1982 Mar</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">114</style></volume><pages><style face="normal" font="default" size="100%">393-9</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Ring preparations of the superficial buccal segment of the human facial vein, taken from extirpated tissue in 12 patients during neck surgery, were studied in vitro. The vein developed a maintained intrinsic myogenic tone in response to passive stretch and was supplied with alpha- as well as beta-adrenoceptors, both of which could be influenced by transmural nerve stimulation (TNS) and noradrenaline. These unusual characteristics for a vein are basically similar to the ones described for the rabbit facial vein by Pegram, Bevan &amp;amp; Bevan (1976). In man there seemed to be an inter-individual difference with regard to the abundance of &#039;innervated&#039; alpha- and beta-adrenoceptors. Facial vein specimens from some subjects thus responded with prompt and pronounced net dilatation to TNS with maximum at 4 Hz and those from others with net constriction with maximum at 16 Hz. The latter showed a reversal into neural beta-adrenergic dilatation after alpha-adrenergic blockade. The human external jugular vein was devoid of intrinsic tone and beta-adrenoceptors. It is tentatively proposed that a beta-adrenergic neuro-effector mechanism in superficial ramifications of the facial vein in man might be involved in the emotional blushing reaction.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><custom1><style face="normal" font="default" size="100%">&lt;p&gt;http://www.ncbi.nlm.nih.gov/pubmed/6291328?dopt=Abstract&lt;/p&gt;
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