Summary of preoperative neurological findings and electrophysiological results according to tumour location (groups A–E)
| Neurological deficit | SEP localisation | Electrical stimulation mapping | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Group | None | Motor | Sensory | Both | Yes | No | Total | Yes | No | Total |
| Yes=Central sulcus localisation successful; No=not successful. | ||||||||||
| A | 35 | 6 | 0 | 0 | 40 | 1 | 51 | 8 | 0 | 8 |
| B | 66 | 9 | 0 | 1 | 73 | 3 | 76 | 7 | 2 | 9 |
| C | 10 | 27 | 3 | 9 | 42 | 7 | 49 | 6 | 1 | 7 |
| D | 27 | 2 | 6 | 4 | 33 | 6 | 39 | 9 | 0 | 9 |
| E | 20 | 0 | 3 | 2 | 23 | 2 | 25 | 7 | 0 | 7 |
| Patients (n) | 158 | 44 | 12 | 16 | 211 | 19 | 230 | 37 | 3 | 40 |