Short rhythmic bursts of brainwave activity that appear during Stage 2 sleep are called?

Short rhythmic bursts of brainwave activity that appear during Stage 2 sleep are called sleep spindles. These spindles are thought to play a role in memory consolidation and the processing of information. They typically occur in brief bursts and are characterized by their high frequency. Sleep spindles contribute to the overall quality of sleep and are an important feature of the sleep cycle.