NDLI: The computational study of subdural cortical stimulation: A quantitative analysis of voltage and current stimulation

Content Provider	IEEE Xplore Digital Library
Author	Donghyeon Kim Hyeon Seo Hyoung-Ihl Kim Sung Chan Jun
Copyright Year	2012
Description	Author affiliation: Sch. of Inf. & Commun., Gwangju Inst. of Sci. & Technol., Gwangju, South Korea (Donghyeon Kim; Hyeon Seo; Sung Chan Jun) \|\| Grad. Program of Med. Sci. Eng., Gwangju Inst. of Sci. & Technol., Gwangju, South Korea (Hyoung-Ihl Kim)
Abstract	We investigated the effect of electrode type and stimulation condition (voltage stimulation and current stimulation) in bi-polar subdural cortical stimulation (SCS). For this study, we developed a 3D realistic head model using MRI data with 1 $mm^{3}$ spatial resolution and simulated the model using the finite element method (FEM). For each study, we used three types of electrodes - disc, ring, and covered-disc - and three efficiency measures - effective depth of penetration, effective volume, and amount of CSF leakage current - to compare the effectiveness of the stimulation between two stimulation conditions. With voltage stimulation, there was no difference in effectiveness between the disc and ring electrodes. However, the amount of CSF leakage current for the covered-disc type was lower than that for the others. The effective depth of penetration and volume for the ring and disc type electrodes were higher than those for the covered-disc type. The current stimulation using the covered-disc electrode penetrated deeper than the other types of electrodes, and the CSF leakage current was still low. The result for voltage and current stimulation was quite different, as the substrate design manipulated the impedance and output current. In the current simulation, if the electrode was covered with the substrate, more current flowed to the cortex. On the other hand, with voltage stimulation, this substrate design makes the impedance between electrodes high, and the total current is reduced.
Sponsorship	IEEE Eng. Medicine Biol. Soc.
Starting Page	867
Ending Page	870
File Size	1389167
Page Count	4
File Format	PDF
ISBN	9781424441198
ISSN	1557170X
e-ISBN	9781457717871
DOI	10.1109/EMBC.2012.6346069
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Leakage current Fluids Substrates Brain modeling Current density
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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