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Construction of Local Field Potential Microelectrodes for in vivo Recordings from Multiple Brain Structures Simultaneously
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Electric Field Comparison between Microelectrode Recording and Deep Brain Stimulation Systems-A Simulation Study.

Fabiola Alonso1, Dorian Vogel2,3, Johannes Johansson4

  • 1Department of Biomedical Engineering, Linköping University, 58185 Linköping, Sweden. fabiola.alonso@liu.se.

Brain Sciences
|February 9, 2018
PubMed
Summary
This summary is machine-generated.

Deep brain stimulation (DBS) electrode placement is crucial. Differences in electric field distribution between intraoperative testing and chronic stimulation, influenced by lead design and setup, can impact clinical outcomes.

Keywords:
Dice coefficientbrain modeldeep brain stimulation (DBS)finite element method (FEM)microelectrode recording (MER)patient-specific

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Area of Science:

  • Neurosurgery
  • Medical Engineering
  • Computational Neuroscience

Background:

  • Deep brain stimulation (DBS) efficacy depends on precise electrode localization.
  • Intraoperative microelectrode recording (MER) and stimulation tests guide electrode placement, but optimal positions may differ from chronic stimulation targets.

Purpose of the Study:

  • To investigate how lead design, electrical setup, and operating modes affect electric field (EF) distribution during DBS.
  • To evaluate the consequential impact of these EF variations on clinical outcomes using computational modeling.

Main Methods:

  • Development of finite element method (FEM) models for both MER systems and chronic DBS leads.
  • Simulation of EF distribution in homogenous and patient-specific brain models.
  • Evaluation of factors including grounding, parallel MER leads, and non-active DBS contacts.

Main Results:

  • EF distribution is significantly altered by the distance between the guide tube and the stimulating contact.
  • The presence of multiple parallel MER leads and non-active DBS contacts influences EF patterns.
  • The electric field volume of DBS can differ from, and extend beyond, the intraoperatively generated EF.

Conclusions:

  • Variations in EF distribution between intraoperative stimulation tests and chronic DBS are significant.
  • These EF deformations, influenced by lead design and electrical configuration, must be considered to optimize clinical outcomes in DBS therapy.