Final answer:
Main intraoperative EEG frequencies include beta waves (13-30 Hz) and alpha waves (8-12 Hz). The EEG monitors the electrical activity of the brain during surgery, capturing both frequency and amplitude, which is essential for ensuring patient safety.
Step-by-step explanation:
Intraoperative EEG Frequencies and Monitoring
The main frequencies of intraoperative electroencephalography (EEG) that are captured are beta waves and alpha waves. Beta waves, which are characteristic during wakefulness, have a very low amplitude and a frequency of 13-30 Hertz (Hz). Alpha waves, seen during the early part of non-REM stage 1 sleep, have a fairly low amplitude with a frequency of 8-12 Hz. The EEG monitors the electrical activity of the brain, capturing both the frequency and amplitude of brainwaves with accuracy within milliseconds, which is crucial during surgery to monitor for any changes in brain function.
An EEG uses an array of electrodes placed around a person's head to measure the brain's electrical activity. This is particularly helpful for researchers studying sleep patterns, such as in individuals with sleep disorders, as the brainwave patterns during various stages of sleep, including REM and NREM sleep, can be differentiated. Intraoperative EEG is used to monitor the patients' brain function during surgical procedures for ensuring their safety and well-being.