Global field power and averaging in measuring somatosensory evoked potentials under anesthesia

Abstract

We have recorded electroencephalography during scoliosis corrective surgery from 7 channels from a patient under anesthesia. The data was used to develop a fast method to detect a response loss indicating impending neural damage. A combination global field power utilizing reference free channel derivations and averaging of the responses yields a fast responding result enabling the surgeon to make corrective procedures to the operation technique to save the patient's nerves from permanent injury.