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.
This is called syncopation. To illustrate, let's take a simple melody, Mary Had A Little Lamb, and see how it would be played in ragtime. First let's to the basic melody and chords. Now let's give it a ragtime bass. Notice how the bass consists of alternating octaves and chords. The octaves are played on the downbeats and the chords on the upbeats. Let's add the melody now. It's still not ragtime yet because the melody is not syncopated or played between the beats.