Four recent cases utilizing transabdominal motor-evoked potentials (TaMEPs) are presented as illustrative of the monitoring technique during lumbosacral fusion, sciatic nerve tumor resection, cauda equina tumor resection, and lumbar decompression. Case 1: In a high-grade lumbosacral spondylolisthesis revision fusion, both transcranial motor-evoked potentials (TcMEPs) and TaMEPs detected a transient focal loss of left tibialis anterior response in conjunction with L5 nerve root decompression. Case 2: In a sciatic nerve tumor resection, TcMEPs responses were lost but TaMEPs remained unchanged, the patient was neurologically intact postoperatively. Case 3: TaMEPs were acquired during an L1-L3 intradural extramedullary cauda equina tumor resection utilizing a unique TaMEP stimulation electrode. Case 4: TaMEPs were successfully acquired with little anesthetic fade utilizing an anesthetic regimen of 1.1 MAC Sevoflurane during a lumbar decompression. While the first two cases present TaMEPs and TcMEPs side-by-side, demonstrating TaMEPs correlating to TcMEPs (Case 1) or a more accurate reflection of patient outcome (Case 2), no inference regarding the accuracy of TaMEPs to monitor nerve elements during cauda equina surgery (Cases 3) or the lumbar decompression presented in Case 4 should be made as these are demonstrations of technique, not utility.

四个最近使用经腹运动诱发电位 (TaMEPs) 的病例作为腰骶融合、坐骨神经肿瘤切除、马尾神经肿瘤切除和腰椎减压期间监测技术的说明。案例 1：在高度腰骶椎滑脱修复融合术中，经颅运动诱发电位 (TcMEPs) 和 TaMEPs 都检测到左胫骨前肌反应的短暂局灶性丧失以及 L5 神经根减压。案例 2：在坐骨神经肿瘤切除术中，TcMEPs 反应丢失但 TaMEPs 保持不变，患者术后神经功能完好。案例 3：TaMEPs 在 L1-L3 硬膜内髓外马尾神经肿瘤切除术中使用独特的 TaMEP 刺激电极获得。案例四：在腰椎减压期间，使用 1.1 MAC 七氟醚的麻醉方案成功获得了 TaMEP，几乎没有麻醉剂褪色。虽然前两个案例并排呈现 TaMEPs 和 TcMEPs，证明 TaMEPs 与 TcMEPs 相关（案例 1）或更准确地反映患者结果（案例 2），但没有推断 TaMEPs 在尾部监测神经元件的准确性应该进行马术手术（案例 3）或案例 4 中的腰椎减压术，因为这些都是技术演示，而不是实用性。