Inferring regional brain activity from evoked potential fields on the scalp.
A new method is described to calculate epicortical potential fields from scalp fields based on linear algebra. It requires detailed anatomical information, for each subject, obtained from MR images. The calculation is validated in a physical model of the human head and applied to human subjects. The results suggest that the method yields reliable epicortical fields that help to localize evoked cortical activity in humans.
Srebro
R
R
Department of Ophthalmology, University of Texas, Southwestern Medical Center at Dallas 75235-8592.
Oguz
R M
RM
Hughlett
K
K
Sanders
N B
NB
Purdy
P D
PD
D001921:Brain / Q000033:anatomy & histology / Q000502:physiology*; D004569:Electroencephalography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008959:Models, Neurological; D012535:Scalp / Q000502:physiology*