Quantitative Sleep Monitoring - Quantitative EEG Analysis Methods and Clinical Applications - page 277

Stage 3-4 power spectrum for EEG

1

0.8

0.6

0.4

0.2

0

2468 012 14 16 18 20
Figure 10.12 An increase in the delta frequency band, specifically those bands less than 2 Hz, can
be seen when the patient is in stages 3 and 4 of NREM sleep.

0

Stage REM power spectrum for EEG

1

0.8

0.6

0.4

0.2

0

2468 012 14 16 18 20
Figure 10.13 After the patient enters REM sleep, the sawtooth waves are denoted by the increase in
the theta frequency band (4 to 7 Hz).

0

LOC-AVG

ROC-AVG

Figure 10.14 Slow eye movements from the EOG recording stage 1 of NREM sleep. (Courtesy of James Geyer
and Paul Carney.)

LOC-AVG

ROC-AVG

Figure 10.15 Rapid eye movements from the EOG taken during REM sleep. (Courtesy of James Geyer and

Paul Carney.)