The theoretical relation of scalp Laplacian and scalp current density of a spherical shell head model.
The theoretical relation between the scalp Laplacian (SL) and the scalp current density (SCD) is derived for a spherical shell head model. The result shows that they are related by a function of spatial frequency. For practically available low spatial frequencies, they are approximately linearly related to each other, so the SL estimate may be considered as an approximate SCD estimate in practice.
School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China. dyao@uestc.edu.cn
Dezhong
D
Yao
D000465:Algorithms; D001921:Brain / Q000473:pathology*; D001931:Brain Mapping; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D006257:Head / Q000473:pathology; D006801:Humans; D015233:Models, Statistical; D008962:Models, Theoretical; D012535:Scalp / Q000473:pathology*; D013997:Time Factors