1. Microelectrode Recording Using the FHC micro-drive

2. Microelectrode Recording Calculate the micro-drive starting point Assemble the FHC micro-drive Insert the cannulae Insert the microelectrode Additional tracks: –Perform a parallel track –Using the offset positioner Place the DBS lead

3. Starting Point Calculation Depth to target is from alignment adapter Offset calculates for FHC stackup Allowable targeting range is 150-180mm

4. FHC Calculation Stealth Depth FHC Offset Target Depth Approach Height Start Position X- 135 mm= Y- Z= Start example 160- 135 mm= 25 mm- 15 mm= 10 mm

5. FHC Assembly Remove alignment adapter Insert Center positioner Attach drive base Attach micro-drive Note: be sure drive is set to starting depth

6. Cannulae insertion Insert stylet through passing cannula Attach collet to passing cannula Pass cannula/collet combo into drive Remove Stylet Insert microelectrode cannula Note: be sure drive is set to starting depth

7. Microelectrode insertion Retract microelectrode within sheath Pass microelectrode through cannula Advance electrode Connect recording system cables Note: be sure drive is set to starting depth

8. Microelectrode Recording

9. Parallel Tracts Retract drive to starting point Remove cannula & re-insert through offset

10. Offset Positioner Retract drive to starting point Remove cannula Remove drive and drive base Remove center positioner Choose direction for offset Insert offset positioner Re-assemble drive and cannula

11. Possible Tracks Center Positioner 3mm offset at “B” 3mm offset at “G” Center Positioner at 45°

12. Lead Placement Set drive to desired target depth Remove microelectrode and spacer cannula Attach lead holder Insert lead - depth stop at 347mm