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.
Later in 1899, Scott Joplin, an American pianist and composer, released âMaple Leaf Rag,â which turned out to be one of the most influential pieces of the era. His beloved hit brought a bit of sophistication to the ragged rhythm and became memorable; however, that was not to be his only great contribution to music. The well-known King of Ragtime composed 44 ragtime jazz pieces, 2 operas and 1 ballet.