P 108 Modified motor threshold criterion for intraoperative corticobulbar MEPs for prediction of postoperative facial nerve outcome

Intraoperatively, facial nerve (FN) function can be assessed with corticobulbar Motor Evoked Potentials (FN-coMEP). MEP-amplitude decrement and increase in motor threshold (MT) serve as warning criteria. A novel threshold criterion for extremity MEP additionally compared MT-increments to the non-operated side (bilateral final-to-baseline motor threshold level, BFB-MT). We applied BFB-MT for FN-coMEP with regard to postoperative FN-function.

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