Tip

Alert and REM are both Beta waves.

Mnemonic

• In REM stage, B for Beta and Boner.
  • REMember your dream
  • REMain still (so you won’t act like in dreams)
• To remember K complex and Sleep Spindle is N2
  • It takes ‘2’ to “KiSS” (also note that kissing involves mouth and hence teeth=Teeth grinding)
• Delta for Deepest sleep

Mnemonic

1. N1: Obstructive Sleep ApN1a
2. N3: All these things happen in deepest sleeping.
3. REM: In MDD you have less fine, deep sleep (N3), more REM.