October 13, 2026
Undergoing spine or brain surgery requires confidence that your critical neurological functions—such as motor movement, sensation, and coordination—will remain completely protected throughout the procedure.
Modern neurosurgery heavily relies on Intraoperative Neurophysiological Monitoring (IONM). IONM acts as a continuous safety system, tracking the functional integrity of your spinal cord, brainstem, and peripheral nerves in real time while you are under anesthesia.
IONM is managed by a specialized neurophysiologist working alongside the surgical team inside the operating room.
Before surgery begins, tiny, non-invasive sensors and electrodes are placed on specific muscle groups and sensory zones on your arms, legs, and trunk. Throughout the operation, electrical signals are passed along nerve pathways to continuously test neural conduction:
If a surgical maneuver—such as placing a hardware screw or decompressing a tight spinal segment—causes subtle pressure or stretch on a nerve, the IONM system immediately detects changes in electrical conduction speeds.
The monitoring specialist alerts the operating surgeon within seconds. The neurosurgeon can adjust surgical positioning, relieve mechanical pressure, or alter techniques immediately—preventing nerve injury before permanent damage occurs.
By providing real-time physiological feedback, Intraoperative Nerve Monitoring significantly increases the precision, safety, and predictability of complex brain and spine surgeries.