Fig. 3

Intra-operative monitoring view. A FREMAPs were measured every three seconds during the tumor resection. ANTs-mediated E-ABR and E-DNAP are also detected every two seconds. If one of these waveforms deteriorated, the monitoring teams cautioned the surgeon. B Final monitoring results were shown. While FREMAP amplitude decreases were observed, EABR latency and EDNA amplitudes were maintained at the initial level