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. Author manuscript; available in PMC: 2019 Jul 1.
Published in final edited form as: J Neurosurg. 2017 Sep 15;129(1):157–164. doi: 10.3171/2017.3.JNS162559

FIG. 2.

FIG. 2.

Intraoperative placement of HG depth electrode. A: The planning view on the frameless stereotactic system (Stealth Navigation, Medtronic) showing the entry point and the trajectory (green circles and dotted lines B: The similar planning view showing the target and the trajectory. C and D: Intraoperative photographs showing placement of HG depth electrode. A Stealth Navigus probe was used to select the appropriate trajectory of a guiding tube positioned over the entry point (C). An electrode-guiding cannula was advanced through the tube to the previously determined depth (D). An actual depth electrode was subsequently passed through the cannula, followed by removal of the guiding tube/cannula system. Note the unique anterolateral-to-posteromedial trajectory within the STP for placement of HG depth electrode. Figure is available in color online only.