Effect of fat and muscle tissue conductivity on cortical currents - a tDCS study

Shahid, Salman and Wen, Peng and Ahfock, Tony (2011) Effect of fat and muscle tissue conductivity on cortical currents - a tDCS study. In: 2011 IEEE/ICME International Conference on Complex Medical Engineering (ICME 2011), 22-25 May 2011, Harbin, China.


Cortical current density distribution induced by tDCS has been assessed using an anatomically accurate high esolution finite element head model. The study examines the influence of low conductive fat tissue and muscle layers on cortical modulation. Comparison between commonly used 5 layers and proposed 7 layers head model has been carried out using statistical matrices (RDM, MAG and CC). Results indicate
that fat and muscle tissue have a profound effect on cortical current distribution. These layers reduce the effective volume of scalp, thus leading to a reduction in the preferential current pathways around scalp. These findings support the need of more complex head models so that more accurate estimates can be made on the effects of cortical current stimulation on neurons.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2011 IEEE. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 04 Aug 2011 05:26
Last Modified: 14 Mar 2018 02:57
Uncontrolled Keywords: tDCS; tissue conductivity; cortical modulation; fat tissue; head model; high resolution; muscle layers; muscle tissues; finite element model
Fields of Research : 10 Technology > 1004 Medical Biotechnology > 100402 Medical Biotechnology Diagnostics (incl. Biosensors)
17 Psychology and Cognitive Sciences > 1702 Cognitive Sciences > 170205 Neurocognitive Patterns and Neural Networks
09 Engineering > 0903 Biomedical Engineering > 090399 Biomedical Engineering not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
E Expanding Knowledge > 97 Expanding Knowledge > 970111 Expanding Knowledge in the Medical and Health Sciences
Identification Number or DOI: 10.1109/ICCME.2011.5876735
URI: http://eprints.usq.edu.au/id/eprint/19386

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