Acute proliferative glomerulonephritis. Acute proliferative glomerulonephritis is a disorder of the glomeruli (glomerulonephritis), or small blood vessels in the kidneys.
Syncopation is created when the accent is shifted to a weak beat or an offbeat. But this term applies to music...
A back beat, or backbeat, is a syncopated accentuation on the off beat. In a simple 4/4 rhythm these are beats 2 and 4. A big part of R&B's attraction had to do with the stompin' backbeats that make it so eminently danceable, according to the Encyclopedia of Percussion.