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.
1800s â Ragtime. Jazz music is a conglomeration of various cultural ideals and music genres. One of the first variations of jazz was ragtime. With its roots based in the Deep South of the United States, ragtime is a style of syncopated piano music with a beat that feels like a march.