Sleep, Slow-Wave

**Definition:** A stage of sleep characterized by synchronized wave activity as observed in the ELECTROENCEPHALOGRAM; the waves exhibit a frequency of 0.5 to 2 Hz, and a peak-to-peak amplitude greater than 75 microvolts.

**Tree numbers:** - F02.830.855.796.835 - G11.561.803.754.835

**Synonyms:** - NREM Stage 3 - Delta Sleep - N3 Sleep - Deep Sleep - Slow-Wave Sleep