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.
The syncopated motif: when counted in 2/4-time yields a feel of short - long - short, (with a fourth sound added for definition), is the most common syncope found in ragtime. It comes from the cakewalk, a high-stepping dance popularized on the minstrel stage and which often served as the show's finale.