IONM

Intraoperative neurophysiological monitoring (IONM) or
intraoperative neuromonitoring is the use of electrophysiological
methods such as electroencephalography (EEG)
electromyography (EMG), and evoked potentials to monitor
the functional integrity of certain neural structures
e.g., parts of the brain, spinal cord and peripheral nerves during surgery
The purpose of IONM is to reduce the risk to the patient
of iatrogenic damage to the nervous system
and/or to provide functional guidance to the surgeon
and anesthesiologist