What is the frequency range of slow wave activity according to AASM?

The frequency range of slow wave activity, as defined by the American Academy of Sleep Medicine (AASM), is critical for understanding sleep architecture, particularly in identifying stages of non-REM sleep. Slow wave sleep (SWS) is characterized by high-amplitude, low-frequency brain waves, typically seen in stages 3 and 4 of non-REM sleep.

The correct answer, which indicates a frequency range of 0.5-2 Hz, accurately reflects the frequencies associated with slow wave activity. This range is significant because it marks the oscillations that are most closely aligned with the sleep state important for restorative functions. Slow waves are essential for memory consolidation, metabolic regulation, and overall brain health.

Understanding this frequency range helps polysomnographic technologists in accurately classifying sleep stages and recognizing potential sleep disorders associated with disruptions in slow wave activity. The other options either extend the frequency range below or above the established parameters, which would not correctly fit the definition of slow wave activity as defined by the AASM.