
Keywords: FN، منفی کاذب; Intraoperative monitoring; Motor-evoked potentials; Postoperative outcome; Spinal cord tumorsC, Cervical; CEM, Cervical extramedullary; CIM, Cervical intramedullary; EM, Extramedullary; FN, False negative; FP, False positive; IM, Intramedullary; iMEP, Int