Table 2.
Characteristics of intraoperative positive mapping points
| Induced symptoms | Number (%) |
|---|---|
| Speech disorder | 123 (27.2%) |
| Anarthria | 64 |
| Dysarthria | 24 |
| Speech arrest | 18 |
| Others | 17 |
| Motor disorder | 112 (24.7%) |
| Involuntary movement | 65 |
| Motor control disorder | 47 |
| Language disorder | 73 (16.1%) |
| Anomia | 23 |
| Phonemic paraphasia | 13 |
| Semantic paraphasia | 20 |
| Others | 17 |
| Sensory disorder | 68 (15.0%) |
| Visual field disorder | 30 (6.6%) |
| Socio-cognitive disorder | 27 (6.0%) |
| Visuospatial disorder | 19 (4.2%) |
| Others | 20 |
| Total | 453 |
| Threshold of stimulation | |
| 1.5--2.0 mA | 3 (3%) |
| 2.5--3.0 mA | 22 (24%) |
| 3.5--4.0 mA | 35 (39%) |
| 4.5--5.0 mA | 19 (21%) |
| 5.5--6.0 mA | 11 (12%) |
| Mean 4.0 (±1.1) mA |