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.