While BIS technology helps anesthesia providers achieve desired levels of hypnosis, they currently rely primarily on monitoring hemodynamic (blood pressure and heart rate), autonomic (tearing, sweating), and somatic (moving) responses to noxious (painful) stimulation as a means to detect potential patient arousals. Additional analgesics (narcotics, NSAIDS) are often administered in order to suppress further response to noxious (painful) stimulation. Several studies have shown that noxious stimulation can also affect EEG signals, resulting in increased variability in the BIS index, suggesting that information in EEG signals could potentially help clinicians anticipate and detect patient response to noxious stimulation.