scholarly journals Relationship between Neural Activation and Electric Field Distribution during Deep Brain Stimulation

2015 ◽  
Vol 62 (2) ◽  
pp. 664-672 ◽  
Author(s):  
Mattias Astrom ◽  
Elin Diczfalusy ◽  
Hubert Martens ◽  
Karin Wardell
Keyword(s):  
Deep Brain Stimulation ◽  
Electric Field ◽  
Field Distribution ◽  
Brain Stimulation ◽  
Electric Field Distribution ◽  
Neural Activation ◽  
Deep Brain

Electric Field Distribution around the Deep Brain Stimulation Electrode Inferred from Dielectric Measurements

2012 ◽  
Vol 730-732 ◽  
pp. 26-31
Author(s):  
Bogdan Neagu ◽  
Eugen R. Neagu ◽  
Rui Igreja ◽  
C.J. Dias
Keyword(s):  
Deep Brain Stimulation ◽  
Electric Field ◽  
Uniform Distribution ◽  
Brain Stimulation ◽  
Electric Field Distribution ◽  
Electrode Impedance ◽  
Model Calculations ◽  
Deep Brain Stimulation Electrode ◽  
Stimulation Electrode ◽  
Deep Brain

Information about the spatial distribution of the electric field can be obtained by measuring the electrode impedance as a function of the diameter of the electrolyte surrounding the electrode. The non-uniform distribution of the electric field around the electrode is supported by the variation of the geometry factor (GF) with the electrical conductivity and geometry of the volume conductor. A comparison of the values obtained for the GF from experimental data, from model calculations and simulations help to understand the non-uniform distribution of the electric field. The GF calculated from four-electrode-measurements is significantly higher. GF should be used with caution in calculations of the deep brain stimulation (DBS) electrode impedance.

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