Peter Sherman LaViolette1, Alastair Hoyt2, Scott D. Rand3, Kathleen M. Schmainda1, Wade M. Mueller2
1Biophysics, Medical College of Wisconsin, Milwaukee, WI, United States; 2Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, United States; 3Radiology, Medical College of Wisconsin, Milwaukee, WI, United States
Epileptic patients with medically intractable seizure disorders are subject to implantation of subdural electrodes for the purpose of seizure localization. It is assumed that these electrodes remain stationary during the reopening of the craniotomy defect at the time of resective surgery. This study shows that brain compression changes and general grid shift both occur and move electrodes in non-trivial amounts. This study builds a case for adoption of electrode/brain model reliance for electrode position determination instead of traditional visual assessment at the reopening of the craniotomy.