continuous dynamic monopolar motor mapping (short-train interstimulus interval 4.0 msec, pulse duration 500 μsec) coupled to an acoustic motor evoked potential (MEP) alarm 1).

1)
Schucht P, Seidel K, Beck J, Murek M, Jilch A, Wiest R, Fung C, Raabe A. Intraoperative monopolar mapping during 5-ALA-guided resections of glioblastomas adjacent to motor eloquent areas: evaluation of resection rates and neurological outcome. Neurosurg Focus. 2014 Dec;37(6):E16. doi: 10.3171/2014.10.FOCUS14524. PubMed PMID: 25434385.