No abstract

The vasodilatory effects of nicotinic alcohol tartrate (Roniacol) The flicker fusion threshold has been previously shown to be a reliable and sensitive indicator of the depressing action of anoxia and to reflect the generalized vascular response to vasodilators by alteration in the flicker fusion threshold. In the normal individual, vasodilation has been shown to produce a depression of the flicker fusion threshold by congestion and relative anoxia of the visual apparatus. In the vasospastic individual there is an increase of the flicker fusion threshold by removing the spasm and thus increasing the blood supply.4Digital venous occlusion plethysmography, brachial and digital artery oscillometry, and flicker photometry were utilized in this study.