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.
Styles of Ragtime. During its era, ragtime jazz was associated with many fads in music, including: Cakewalk â Popular up until 1904, this type of music represented the African-American dance contest where the prize was a cake. Most rags up until this point were cakewalks.