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.
Freebase(0.00 / 0 votes)Rate this definition: Ragga. Raggamuffin music, usually abbreviated as ragga, is a sub-genre of dancehall music or reggae, in which the instrumentation primarily consists of electronic music. Similar to hip hop, sampling often serves a prominent role in raggamuffin music.