Table 2. Patients with persistent motor deterioration after brain surgery

Case no. Age (y) Sex Diagnosis Lesion location EP change (%)
ΔSEPLat ΔMEPAmp
1 7 M Chordoma Clivus 9.6 35.7
2 48 F Craniopharyngioma Rt suprasella 7.1 47.2
3 72 F Glioblastoma Rt. temporoparietal lobe 9.9 47.9
4 24 M Anaplastic astrocytoma Rt. frontoparietal lobe 7.2 98.3
5 60 F Craniopharyngioma Suprasella area 1.1 99.7
6 46 M Metastatic brain tumor Rt. parietal lobe 7.4 21.5
7 56 M Metastatic brain tumor Lt. parietal lobe 4.5 32.9
8 43 M Glioblastoma Lt. parietal lobe 5.4 27.9
9 48 M Atypical meningioma Lt. frontoparietal lobe 3.3 9.1
10 58 M Ruptured cerebral aneurysm Rt. Internal carotid anterior choroidal artery 9.4 27.7
11 75 F Meningioma Lt. parasagittal area 9.5 25.4
12 61 M Meningioma Rt. frontal convexity 9.0 32.4
EP: evoked potentials; ΔSEPLat: latency change of somatosensory evoked potential; ΔMEPAmp: amplitude change of motor evoked potential.