Localization and Field Determination in Electroencephalography
where ∇2 is the second spatial gradient operator, Φ is the scalar potential in volts, ρ is the free charge density, and ε is the permittivity of the mass of…
Magnetic Resonance Imaging in Evaluation for Epilepsy Surgery
Figure 73.1. Broca and Wernicke area: A, B: Major landmarks on sagittal images to identify Broca and Wernicke area. C–E: Left perisylvian encephalomalacia due to perinatally acquired ischemic injury displayed…
Focal Motor Seizures
Figure 11.1. Mesial and lateral aspects of the left hemisphere: schematic representation of the three motor areas and their approximate relationship to the surface hemispheric anatomy. The shaded area corresponds…
Generalized Motor Seizures
Figure 14.1. Generalized epilepsy subdivided into convulsive (motor) and nonconvulsive (nonmotor) seizures. (Adapted from Berg AT, Berkovic SF, Brodie MJ, et al. Revised terminology and concepts for organization of seizures…
Nuclear Imaging (PET, SPECT)
Figure 75.1. [18F]FDG-PET (upper row left) showing normal glucose uptake. [18F]FCWAY-PET (top row right) shows decreased binding in the left temporal lobe, most pronounced in the amygdala and hippocampus. Lower…
Hemispherectomy: Indications, Procedures, and Outcome
Figure 84.1. Patient’s position for anatomical hemispherectomy. The head is then shaved and a “T”-shaped incision planned to allow access from the floor of the middle fossa to the midline…
