Branch Retinal Artery Occlusion - Pathophysiology. 1  Most commonly, a branch retinal artery occlusion occurs secondary to an embolus. Emboli typically originate within vessels upstream where they dislodge and travel within the circulatory system to ultimately become lodged downstream in a vessel with a smaller lumen.
Ragtime is a musical form or style that is defined as a syncopated melody (usually in 2/4 time) over a regular, march tempo bass line. Improvisation was common but little of that aspect has been preserved.
(2) An American salon and ballroom dance for couples, based on a rhythmic form of ragtime in 2/4 time. Ragtime came into fashion circa 1910. The two-step, the one-step, and the foxtrot are among the dances that developed from ragtime.