| Table
1.7.1: Electrophysiological Characteristics of Sleep Stages
|
|---|
| Stage
of Sleep
| Predominant
EEG Activity
| EOG
Characteristics
| EMG
Activity
|
|---|
|
1
| Low
voltage, mixed frequency |
Slow
| Decreased
from awake |
|
2
| Sleep
spindles and K complexes |
None
| Decreased
from awake |
|
3
| Sleep
spindles and slow waves |
None
| Decreased
from awake |
|
4
| Mostly
slow waves |
None
| Decreased
from awake |
|
REM
| Low
voltage, mixed frequency |
Rapid
| Nearly
absent |
|
Note. EEG
= electroencephalographic; EOG = electrooculographic; EMG = electromyographic;
REM = rapid eye movement. Derived from information in A Manual of Standardized
Terminology, Techniques, and Scoring System for Sleep Stages of Human
Subjects, by A. Rechtschaffen and A. Kales, 1968, National Institutes
of Health Publication No. 204, Washington, DC: U.S. Government Printing
Office.
|