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.
The right hand plays syncopated melodies in a ragged fashion (hence the name ragtime). Ragtime is primarily an African American invention and was a source of pride to African American composers, musicians, and listeners. One of ragtimeâs inventors and most important pianists and composers was Scott Joplin.