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Intracranial electroencephalographic recordings 

Intracranial electroencephalographic recordings
Intracranial electroencephalographic recordings

Gonzalo Alarcón

and Antonio Valentín

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date: 17 May 2022

Around 30% of patients assessed for surgery for the treatment of epilepsy require intracranial electrodes to localize the epileptic focus or to identify functionally relevant cortex. Patients can be very different and the various non-invasive techniques used during presurgical assessment often render conflicting or contradictory results. Deciding the type of electrodes to be used and the sites to be implanted can be puzzling. This chapter describes the electrode types available, their indications, and various implantation strategies. This chapter also summarizes the criteria used to interpret chronic and acute (intraoperative) intracranial recordings, as well at the methods used to carry out and interpret functional mapping with electrical stimulation.

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