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.
Considered the first completely American music, ragtime was popular towards the end of the 19th century and into the first two decades of the 20th century, roughly 1893 to 1917. It is the style of music that preceded jazz. Musical Characteristics. Structured in a way similar to the march, ragtimeâs use of syncopation is largely what distinguished it. Its rhythms made it lively and springy, and therefore ideal for dancing.