Title :
Gradient of surface potential on a homogeneous sphere: lateral hemispheric mean magnitude
Author :
Gaumond, R.P. ; Psaltikidou, M.
Author_Institution :
Pennsylvania State Univ., University Park, PA, USA
Abstract :
The lateral hemispheric mean of the magnitude of the gradient of scalp surface potential due to an eccentric current dipole source was determined for various source positions and orientations within a homogeneous conductive sphere. It was found that a source positioned in one hemisphere can produce a mean gradient which is larger on the surface of the opposite hemisphere. This result suggests that caution must be employed when using surface electrode measurements to establish source laterality
Keywords :
bioelectric potentials; skin; eccentric current dipole source; homogeneous conductive sphere; lateral hemispheric mean magnitude; mean gradient; orientations; scalp surface potential; source positions; surface electrode measurements; Bioelectric phenomena; Biomedical engineering; Conductors; Electric potential; Electrodes; Head; Position measurement; Scalp; Surface fitting; Voltage measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96200
