| Speech difficulty | |
| Cognitive decline | |
| Mood changes | |
| Postop confusion | |
| Hypersexuality | |
| Scalp cellulitis | |
| Scalp electrode erosion and cellulitis, | |
| Required skin graft | |
| Worsened gait or balance | |
| Persistent paresthesia | |
| Tonic face contraction | |
| Eyelid opening apraxia | |
| Device turned off spontaneously | |
| Electrode suboptimally positioned; required repositioning | |