Table 1
DBS coordinates and programming parameters.
| DBS COORDINATES | X | Y | Z | AC-PC ANGLE | CENTER LINE ANGLE |
|---|---|---|---|---|---|
| Left pvlGPi | 20.5 mm left | 4.0 mm anterior | 7.0 mm inferior | 60.3° | 10.1° |
| Right pvlGPi | 21.0 mm right | 4.0 mm anterior | 5.5 mm inferior | 60.5° | 11.1° |
Figure 1
Pre- and postoperative imaging and clinical course. Fast gray matter acquisition T1 inversion recovery magnetic resonance imaging sequences (oblique coronal and axial) to plan lead positioning preoperatively and computed tomography scans (coronal and axial) to evaluate lead placement postoperatively in the (A) left posteroventral globus pallidus interna (pvlGPI) and (B) right pvlGPI. (C) Change in blepharospasm-like tic frequency from before surgery to 6-months after bilateral pvlGP deep brain stimulation.
Table 2
The stimulation parameters at each visit. Stimulation areas and amplitudes were gradually increased.
| TIME POINT | LEFT | RIGHT | ||||||
|---|---|---|---|---|---|---|---|---|
| CATHODE (AMPLITUDE (mA)) | ANODE | PW (µsec) | FREQUENCY (Hz) | CATHODE (AMPLITUDE (mA)) | ANODE | PW (µsec) | FREQUENCY (Hz) | |
| 1 mo | 2 (1.5) | Case | 60 | 130 | 10 (1.5) | Case | 60 | 130 |
| 2 mo | 2 (1.8) | Case | 60 | 130 | 10 (1.8) | Case | 60 | 130 |
| 3 mo | 1 (0.3), 2 (1.5) | Case | 60 | 130 | 9 (0.3), 10 (1.5) | Case | 60 | 130 |
| 4 mo | 1 (0.7), 2 (1.6) | Case | 60 | 135 | 9a (0.5), 9c (0.3), 10a (0.7), 10b (0.3), 10c (0.3) | Case | 60 | 135 |
| 5 mo | 1 (0.7), 2 (1.6), 3 (0.5) | Case | 60 | 135 | 9a (0.5), 9c (0.3), 10a (0.7), 10b (0.3), 10c (0.3) | Case | 60 | 135 |
| 6 mo | 1 (0.7), 2 (1.6), 3 (0.5) | Case | 60 | 135 | 9a (0.5), 9c (0.3), 10a (0.7), 10b (0.3), 10c (0.3), 11 (0.5) | Case | 60 | 135 |