Title :
Spatial sampling of neocortical activity by electrode grids
Author :
Hoekema, Rudi ; Huiskamp, Geertjan ; Wieneke, George
Author_Institution :
Dept. of Clinical Neurophysiol., Univ. Hosp. Utrecht, Netherlands
Abstract :
In epilepsy surgery, electrode grids are often used to measure electrocorticograms (ECoGs). In these electrode grids, the distance between contacts is usually 10 mm. This may not be adequate to sample neocortical electrical activity. In this study, ECoGs were simulated, assuming the location of the electrical sources in the brain generating epileptic spikes. It is concluded that for adequately measuring the electric field generated by cortical sources, the contact distance should be decreased to 5 mm
Keywords :
biomedical electrodes; electroencephalography; surgery; 10 mm; 5 mm; ECoGs; contact distance; electrocorticograms measurement; electrode grids; epilepsy surgery; epileptic spikes generation; neocortical electrical activity sampling; Conducting materials; Conductors; Contacts; Electric variables measurement; Electrodes; Epilepsy; Hospitals; Neurophysiology; Sampling methods; Surgery;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.802530
