NTRS - NASA Technical Reports Server

Back to Results
An equivalent body surface charge model representing three-dimensional bioelectrical activityA new surface-source model has been developed to account for the bioelectrical potential on the body surface. A single-layer surface-charge model on the body surface has been developed to equivalently represent bioelectrical sources inside the body. The boundary conditions on the body surface are discussed in relation to the surface-charge in a half-space conductive medium. The equivalent body surface-charge is shown to be proportional to the normal component of the electric field on the body surface just outside the body. The spatial resolution of the equivalent surface-charge distribution appears intermediate between those of the body surface potential distribution and the body surface Laplacian distribution. An analytic relationship between the equivalent surface-charge and the surface Laplacian of the potential was found for a half-space conductive medium. The effects of finite spatial sampling and noise on the reconstruction of the equivalent surface-charge were evaluated by computer simulations. It was found through computer simulations that the reconstruction of the equivalent body surface-charge from the body surface Laplacian distribution is very stable against noise and finite spatial sampling. The present results suggest that the equivalent body surface-charge model may provide an additional insight to our understanding of bioelectric phenomena.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
He, B.
(Massachusetts Institute of Technology Cambridge 02139, United States)
Chernyak, Y. B.
Cohen, R. J.
Date Acquired
August 22, 2013
Publication Date
July 1, 1995
Publication Information
Publication: IEEE transactions on bio-medical engineering
Volume: 42
Issue: 7
ISSN: 0018-9294
Subject Category
Life Sciences (General)
Funding Number(s)
Distribution Limits
NASA Discipline Regulatory Physiology
Non-NASA Center

Available Downloads

There are no available downloads for this record.
No Preview Available