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. 2022 Apr 7;91(1):132–138. doi: 10.1227/neu.0000000000001957

FIGURE 1.

FIGURE 1.

Recording contact locations with the Summit RC + S. A, Leads were implanted such that contacts 1, 5, 9, and 13 (the second contact of each lead) were optimally situated for monopolar stimulation. Differential LFP data were recorded between contacts 0 and 2. In the GP, the lower sensing contact was in the GPi while the upper sensing contact was in GPe resulting in LFP across the regions. B, Data were transmitted from the Summit RC + S to a CTM over a short-range, proprietary link. The CTM then connected to a research laptop over Bluetooth. Conversely, control signals (eg, stimulation parameter changes) were sent from the laptop through the CTM to the IPG. C, 125-Hz STN + GPi DBS pulse timing. Pulses were delivered in each region every 8 ms with 2 ms between delivery in different regions with STN pulses leading the GPi of the same hemisphere. CTM, communications telemetry module; DBS, deep brain stimulation; GP, globus pallidus; Gpi, globus pallidus pars interna; IPG, implantable pulse generator; LFP, local field potential (differential sensing between the two contacts adjacent to the DBS electrode); NC, contact not used; STN, subthalamic nucleus.