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Related Experiment Video

Updated: Jun 18, 2026

In Vivo Intracellular Recording of Type-Identified Rat Spinal Motoneurons During Trans-Spinal Direct Current Stimulation

In Vivo Intracellular Recording of Type-Identified Rat Spinal Motoneurons During Trans-Spinal Direct Current Stimulation

Published on: May 11, 2020

Intraoperative nerve action potential recordings: technical considerations, problems, and pitfalls.

Everett G Robert¹, Leo T Happel, David G Kline

¹Department of Neurosurgery, Louisiana State University Health Science Center, New Orleans, Louisiana 70112, USA. erobert@lsuhsc.edu

|November 21, 2009

Summary

This summary is machine-generated.

Intraoperative nerve action potential (NAP) recordings offer valuable insights into peripheral nerve lesions. Despite potential challenges, mastering NAP techniques significantly improves surgical decision-making and patient outcomes.

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Last Updated: Jun 18, 2026

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Area of Science:

Neurosurgery
Peripheral Nerve Surgery
Intraoperative Monitoring

Background:

Visual inspection of nerve lesions can be unreliable.
Accurate assessment of nerve integrity is crucial for surgical success.

Purpose of the Study:

To share experience with intraoperative nerve action potential (NAP) recordings.
To discuss technical considerations, problems, and pitfalls of intraoperative NAP.

Main Methods:

Analysis of 1736 patients with 3459 peripheral nerve lesions in continuity.
Focus on cases with difficult or misleading NAP recordings.
Utilized differential fascicular recordings for split repairs.

Main Results:

Positive NAP with neurolysis led to grade 3 or better function in 94.7% of cases.
Absence of NAP correlated with neurotmetic lesions, with 1111/1975 recovering to grade 3+ after repair.
Differential recordings aided 58 of 62 split repairs with recovery.

Conclusions:

Intraoperative NAP recordings are a valuable surgical tool.
Experience and knowledge of NAP techniques overcome challenges.
NAP recordings provide crucial information beyond visual inspection.