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.
Their music is considered a superior form of the style. The term classic ragtime actually was coined by the publisher John Stark who in the first decade of the 20th century began publishing works by Joplin, Lamb, Scot and others and billed them as classic rags and compared their quality to European art songs.