Transcranial electrical motor-evoked potential monitoring allowed successful intraoperative monitoring. The criterion of one recording showing a response amplitude decrease of more than 80% during a surgical action can be considered a valuable warning criterion for neurologic damage. The authors also consider that monitoring at six instead of two muscles improves the value of neuromonitoring.

We conclude that C7 osteotomy with internal fixation has been shown to be a reliable and stable technique. When surgery is performed the in prone position, distal fixation can be optimally obtained allowing post-operative treatment by cervical orthosis instead of a halo-cast. TES-MEP monitoring has been shown to be a reliable neuromonitoring technique with high clinical relevancy during cervical osteotomy because it allows timely intervention before occurrence of permanent cord damage in a large proportion of the patients.

Transcranial electrical motor-evoked potential monitoring allowed successful intraoperative monitoring. The criterion of one recording showing a response amplitude decrease of more than 80% during a surgical action can be considered a valuable warning criterion for neurologic damage. The authors also consider that monitoring at six instead of two muscles improves the value of neuromonitoring.

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