Figure 1.

Schematic illustration of the stimulation protocol. (A) The DBS lead and the stimulated sites. Each lead has four potentially active contacts. In bipolar stimulation, two contacts were active with one cathode and the other anode. Typically, superior contact pair was in the anterior thalamic nuclei (ANT) and inferior contact pair was considered to be outside ANT assigned as the thalamic control location. (B) The whole experiment for each subject included 32 blocks of testing. In the first 16 blocks, either the ANT or the control location was stimulated, or stimulation was turned off. In the second 16 blocks, the other location was stimulated, or stimulation was turned off. The order of stimulated sites was counterbalanced. DBS, deep brain stimulation. This figure is adapted from Peräkylä et al. (2017).