Complex sentence: Parabolic bursting is characterized by a series of bursts that are modulated by a slower, underlying oscillation, where the slower oscillation periodically inhibits bursting so that bursts are separated by periods of quiescence.
Split into simpler sentences: Parabolic bursting is characterized by a series of bursts that are regulated by a slower external oscillation. The slow oscillation periodically inhibits bursting, so that bursts are separated by periods of quiescence.