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Technologies/parameters used for monitoring the nociception-antinociception balance [59,60,61,62,63,64,65,66]. ANI—analgesia nociception index; qNOX index—index of nociception; SPI—Surgical Plethysmographic Index; NOL index—Nociception Level Index; EEG—Electroencephalography; EMG—Electromyography signal.
