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- W2040891396 abstract "Summary: Purpose: To understand the rapid dynamic changes of ictal intracranial high‐frequency oscillations (HFOs) in neocortical epilepsy. Methods: We integrated multiple band frequency analysis and brain‐surface topographic maps of HFOs from ictal subdural EEG (SDEEG) recordings. We used SDEEG to record partial seizures consisting of right‐arm jerks with secondary generalization in a 17‐year‐old right‐handed girl. We selected 20‐s EEG sections that included preclinical seizure recordings. We averaged the HFO power between 60 and 120 Hz for 25 selected electrodes, made topographic maps from these averaged powers, and superimposed the maps on the brain‐surface image. We filmed consecutive HFO maps at a 10‐ms frame rate. Results: Before clinical seizure onset, high‐power HFOs emerged at the superior portion of the left precentral gyrus, then appeared in the middle of the left postcentral gyrus, and subsequently reverberated between both regions as well as the posterior portion of the left postcentral gyrus. Right‐arm extension and facial grimacing started as the HFO power decreased. As generalized tonic–clonic seizures evolved, HFO power increased but remained within the central region. Conclusions: Topographic movies of intracranial HFOs on the brain surface allow visualization of the dynamic ictal changes in neocortical epilepsy." @default.
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- W2040891396 date "2006-11-01" @default.
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- W2040891396 title "Topographic Movie of Ictal High-Frequency Oscillations on the Brain Surface Using Subdural EEG in Neocortical Epilepsy" @default.
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- W2040891396 doi "https://doi.org/10.1111/j.1528-1167.2006.00823.x" @default.
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