Figure 7.

Intraoperative recording setup for experimental access through a burr hole. (A) Photograph of the experiment. An LCP-TF electrode (red arrow) was inserted through burr hole during a deep brain stimulation (DBS) surgery. The DBS base (Nexframe, yellow arrow) and lead (blue arrow) were used without any obstruction. (B) 3D rendering illustrates that the electrode was advanced under the dura more than 80 mm away from the burr hole, reaching the temporal lobe during a language study. (C) A custom 3D printed track system helped to hold the electronics at any angle from the implant site. (D) A pocket was molded at the tip of the electrode array to allowing a malleable brain retractor (brain spatula) to be used as an insertion tool to guide the electrode placement. (E) Photograph of the assembled LCP-TF array and recording system. Two digitizing headstages were connected to the modular adaptor board, requiring only a single μHDMI cable to be connected to the recording controller. Red inset shows the detailed view of the 128 electrode contacts. Blue inset shows the ruler, printed with biocompatible soldermask, on the back side of the LCP-TF electrode. The ruler was used to provide the surgeon relative position information while advancing the array under the dura.