Research Article
Monitoring of Anesthesia by Bispectral Analysis of EEG Signals
Table 1
Characteristics of brain waves.
| | Wave | Physio/psycho | Frequency (Hz) | Amplitude (μV) |
| | Delta | -Deep sleep
Eye movement: abnormal | 0-4 | 300 | | Theta | -Light sleep
-Eyes closed | 4-8 | 50-100 | | Alpha | -Mental calm
Receptivity, relaxation
-Eyes closed | 8-12 | 30-50 | | Beta | -Paradoxical sleep
-Rational thinking
-Eyes open
-Vigilance | 12-30 | 10 | | Gamma | -Simultaneous information from different sectors
-Problem resolution | >30 | — |
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