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Deep Brain Stimulation with Simultaneous fMRI in Rodents
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Microelectrode accuracy in deep brain stimulation surgery.

Bledi Brahimaj1, Ryan B Kochanski1, Sepehr Sani1

  • 1Department of Neurosurgery, Rush University Medical Center, 1725 W. Harrison St, Suite 855, Chicago, IL 60612, United States.

Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia
|February 4, 2018
PubMed
Summary
This summary is machine-generated.

Microelectrode recording (MER) accurately guides deep brain stimulation (DBS) lead placement. This study found MER tip placement has a low radial error, confirming its reliability for targeting brain structures.

Keywords:
AccuracyDeep brain stimulationIntraoperative CTIntraoperative imagingMicroelectrode recordingStereotactic targeting

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Area of Science:

  • Neurosurgery
  • Neurophysiology
  • Medical Imaging

Background:

  • Microelectrode recording (MER) is crucial for neurophysiological guidance during deep brain stimulation (DBS).
  • While DBS lead placement accuracy is well-studied, microelectrode accuracy remains less documented.
  • Accurate targeting is essential for effective DBS therapy.

Purpose of the Study:

  • To assess the accuracy of microelectrode tip placement relative to preoperatively planned radiographic targets in DBS procedures.
  • To quantify the radial and directional error of microelectrode tracks during MER.
  • To evaluate the reliability of MER for confirming target engagement.

Main Methods:

  • Retrospective analysis of 227 microelectrode tracks from DBS procedures (2014-2016).
  • Intra-operative CT (iCT) was used to confirm microelectrode tip accuracy post-placement.
  • Calculation of radial error using Euclidean distance and multivariate analysis for directional bias.

Main Results:

  • The overall radial error for microelectrode tip placement was 1.2 ± 0.2 mm (SEM) across all targets (STN, ViM, GPi).
  • Analysis revealed no significant directional bias in microelectrode track errors.
  • MER demonstrated high accuracy in representing the planned surgical target.

Conclusions:

  • Microelectrode recording is a highly accurate method for neurophysiological targeting in DBS surgery.
  • The findings support the routine use of MER for confirming accurate placement within the intended brain nuclei.
  • MER provides reliable intra-operative feedback, enhancing the precision of DBS procedures.