Table II.
Useful findings (+) in the affected hemisphere for localization of the central sulcus
| Patient | MN‐SEF | TN‐SEF | COHu | COHl | Knob | Width | c.s. | SEP | Stimulation | Difference (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | + | + | + | + | + | + | + | na | na | − |
| 2 | + | + | − | − | + | u | + | na | na | − |
| 3 | + | + | − | + | + | + | + | na | na | − |
| 4 | + | + | − | − | + | + | + | na | hand & lip motor | − |
| 5 | + | − | − | − | + | + | − | na | limbs motor | − |
| 6 | + | − | + | − | + | + | + | na | (not operated) | − |
| 7 | + | + | − | − | + | + | + | na | hand & lip & leg motor, speech | − |
| 8 | + | + | + | + | + | − | + | + | speech | MN‐SEF/SEP 6 |
| 9 | + | + | + | + | + | + | + | + | hand motor & sensory, speech | MN‐SEF/SEP 9 MN‐SEF/sSTIMfin 8 |
| 10 | + | + | − | − | + | − | + | + | fingers (2–5) motor & sensory, lip sensory | MN‐SEF/SEP 7 MN SEF/sSTIMfin 8 LIP‐SEF/sSTIMlip 8 |
| 11 | + | + | + | + | + | + | + | + | hand motor | MN‐SEF/SEP 18 |
| 12 | + | + | + | − | − | + | − | + | limbs motor | MN‐SEF/SEP 9 COHu/mSTIMfin 6 |
MN‐SEF: SEF to median nerve stimulation.
TN‐SEF: SEF to posterior tibial nerve stimulation.
COHu: Coherent MEG‐EMG activity (upper limb).
COHl: Coherent MEG‐EMG activity (lower limb).
Knob: knob in the hand area detectable (+).
Width: width of precentral gyrus: larger (+), equal or smaller than postcentral gyrus (−), undefinable (u) because of tumor mass.
c.s.: central sulcus detectable (+)/not detectable (−) just anterior to the ramus posterior of the cingulate sulcus in the mesial surface of the hemisphere.
SEP: intraoperative SEP to median nerve stimulation; SEP not available (na).
Stimulation: effect of intracortical stimulation; stimulation not available (na).
Difference: Separation of estimated and intraoperative localization; sSTIMfin, sSTIMlip sites eliciting finger and lip sensations in intracortical stimulation; mSTIMfin site eliciting finger movements in intracortical stimulation.