The effect of adrenergic blockade on blushing and facial flushing
- 1 March 1997
- journal article
- clinical trial
- Published by Wiley in Psychophysiology
- Vol. 34 (2), 163-168
- https://doi.org/10.1111/j.1469-8986.1997.tb02127.x
Abstract
The effect of adrenergic blockade on vascular responses in the forehead was assessed during stressful mental arithmetic, singing, and moderate exercise in 21 frequent blushers and 21 infrequent blushers. Adrenergic antagonists were introduced into a small site on the forehead by iontophoresis, and vascular responses were monitored bilaterally with laser Doppler flowmetry. Beta blockade prevented increases in blood flow in infrequent blushers during mental arithmetic and partially inhibited vasodilatation during singing, indicating minor participation of beta-adrenoceptors in blushing. Alpha blockade did not affect blushing but augmented vasodilatation during exercise. Despite higher ratings of self-consciousness in frequent than in infrequent blushers, vascular responses were similar in both groups. Thus, blushing propensity does not appear to be related to the density of alpha- or beta-adrenoceptors in facial vessels and may have a psychological basis.Keywords
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