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Volume Conduction; Left Functional Hemispherectomy. A 2-year-old-left-handed boy with a history of life-threatening seizures resulting from left
hemimegalencephaly associated with linear sebaceous nevus syndrome. He underwent emergency left functional hemispherectomy at 7 days of age and
has been free of disabling seizures since. MRI shows postoperative change. EEG shows nearly continuous sharp waves in the left frontal-temporal region
superimposed on marked background suppression in the left hemisphere. Background EEG activity is normal in the right hemisphere. There are periodic
sharp waves of lower amplitude in the right frontal-temporal (arrows) timed-locked with the homologous sharp waves in the left hemisphere. These sharp
waves are most likely due to volume conduction of electrical discharges from the homologous region in the left hemisphere passing through the skin to the
Source: Focal Nonepileptoform Activity, Atlas of Pediatric EEG
right frontal-temporal region as the propagating pathway through the corpus callosum has been eliminated by the surgery. This is another example of EEG
Atlas67of Pediatric EEG; 2011 Available at: http://mhmedical.com/ Accessed: June 10, 2017
application ofCitation:
volume Laoprasert
conduction P.
theory.
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