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.
Scott Joplin (between July 1867 and January 1868 - April 1, 1917) was an Afro-American composer and pianist, born near Texarkana, Texas, into the first post-slavery generation â¦ . He achieved fame for his unique ragtime compositions, and was dubbed the King of Ragtime.. The Jim Crow Era was a post of the civil war   Ragtime Music   The mai â¦ n instrument used is the piano   It was most popular between 1897-1918   The most famous rag-time composers were: Scott Joplin, Joseph Lamb, James Scott.