Neurophysiology and neuromonitoring Essentials

neuroanaesthesia neuromonitoring neurophysiology Jun 29, 2026

In neuroanaesthesia, understanding neurophysiology is essential.

For perianaesthesia nurses caring for neurosurgical patients, it provides the foundation for interpreting monitoring, anticipating physiological changes, and supporting neurological protection throughout the perioperative journey.

The nervous system relies on precise electrical communication between neurons. Every motor response, sensory pathway and cortical function depends on these signals remaining intact. During neurosurgery, protecting these pathways becomes a major priority.

This is where neurophysiology and neuromonitoring come together.

Intraoperative neuromonitoring helps assess the functional integrity of neural pathways in real time. Modalities such as EEG, somatosensory evoked potentials (SSEPs), motor evoked potentials (MEPs) and electromyography provide valuable information about brain, spinal cord and nerve function during surgery.

Anaesthetic technique plays a major role in preserving these signals.

Volatile anaesthetic agents can suppress cortical activity and significantly reduce neuromonitoring signal quality. Total intravenous anaesthesia is often preferred during neurosurgical procedures requiring neuromonitoring because it allows more reliable signal interpretation. Neuromuscular blockade must also be carefully managed, particularly when motor responses are being monitored.

Key concepts to remember:

🧠 Neurophysiology underpins all neurological function

⚡ Neuromonitoring helps detect neurological compromise early

💉 Anaesthetic agents directly influence monitoring quality

📉 Hypotension, hypothermia and physiological instability affect signal interpretation

🔍 Anaesthetic planning must support both surgical access and neurological protection

For perianaesthesia nurses, understanding these principles strengthens clinical awareness and supports safer neuroanaesthesia care.

When we understand the physiology behind the monitoring, we are better equipped to recognise change, respond early, and advocate for neurological safety.

Build Knowledge ✅

Improve Safety ✅

References:

Neurophysiological Sciences Society of Australasia. (2023). A volatile relationship. https://www.neurophysiologysociety.com.au/news/a-volatile-relationship

McCluskey, A., & Mehta, A. (2022). Neurophysiology and anaesthesia. Update in Anaesthesia. https://www.sciencedirect.com/science/article/pii/S1472029922002429

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