Video 1.
Postural and Intention Tremor Examination. The video starts by tremor examination in the deep brain stimulation (DBS) ON state followed by an examination in the DBS OFF state (1 month apart). It is notable that there is limited DBS control of tremor on the right side of the body with significant tremor control on the left side of the body. The stimulation settings for the left‐sided lead are interleaving C+, 2–, 2 V, PW = 90 µs, Freq = 125 Hz and C+, 3–, 4 V, PW = 120 µs, Freq = 125 Hz. The stimulation settings for the right‐sided lead are C+, 2–, 2.9 V, PW = 90 µs, Freq = 160 Hz.
Table 1
Monopolar Threshold Review
| Contact Tested | Side Effect Threshold (V) | Side Effect Noted |
|---|---|---|
| Right lead | ||
| 0 | 0.5 | Tingling of the left face, arm, and leg |
| 1 | 1.0 | Tingling of the left face and leg |
| 2 | 3.0 | Tingling of the left hand |
| 3 | 3.6 | Tingling of the left face and leg |
| Left lead | ||
| 0 | 0.9 | Chorea in the right arm |
| 1 | 1.0 | Chorea in the right arm |
| 2 | 2.6 | Subjective “dizziness” |
| 3 | 3.5 | Tingling of the head |
Figure 1
Postoperative Lead Location Mapping. The dashed red line is the location of the DBS lead based on magnetic resonance imaging. The thalamus (green), striatum (blue), globus pallidus external segment (green), globus pallidus internal segment (orange) and subthalamic nucleus (red) are outlined as shown. The approximate location of the contacts is shown as white dots.
